/* ============================================================
   阁主 · 作品集 — 多页版本共享样式
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* ============================================================
     Design Tokens — 全站统一规范
     任何色值/间距/字号/动画都从这里取，禁止硬编码
     ============================================================ */

  /* ---- 背景色阶（4 档）---- */
  --c-bg: #ffffff;
  --c-bg-soft: #fafafa;
  --c-bg-tint: #f4f6f9;
  --c-bg-dark: #0a0a0c;   /* L2 OpenClaw core 等深色块用 */

  /* ---- 边框色阶（2 档）---- */
  --c-line: #ececec;
  --c-line-strong: #d9d9d9;

  /* ---- 文字色阶（4 档：标题/正文/辅助/占位）---- */
  --c-text: #0a0a0a;
  --c-text-2: #404040;
  --c-text-3: #737373;
  --c-text-4: #a3a3a3;

  /* ---- RGB 通道（用于构造 rgba：阴影、透明背景等）---- */
  --c-brand-rgb: 37, 99, 235;
  --c-text-rgb:  15, 23, 42;

  /* ---- 品牌色（蓝：主品牌）---- */
  --c-brand: #2563eb;
  --c-brand-2: #1d4ed8;
  --c-brand-soft: #eff6ff;
  --c-brand-soft-2: rgba(var(--c-brand-rgb), .08);
  --c-brand-soft-3: rgba(var(--c-brand-rgb), .12);
  --c-brand-soft-border: rgba(var(--c-brand-rgb), .18);
  --c-brand-glow: rgba(var(--c-brand-rgb), .35);

  /* ---- 辅助色（紫/绿：arch-why 死结 02/03、装饰用途）---- */
  --c-purple: #8b5cf6;
  --c-purple-rgb: 139, 92, 246;
  --c-purple-soft: rgba(var(--c-purple-rgb), .08);
  --c-purple-glow: rgba(var(--c-purple-rgb), .35);

  --c-green: #10b981;
  --c-green-rgb: 16, 185, 129;
  --c-green-soft: rgba(var(--c-green-rgb), .08);
  --c-green-glow: rgba(var(--c-green-rgb), .35);

  --g-brand: linear-gradient(135deg, var(--c-brand) 0%, var(--c-brand-2) 100%);

  /* ---- 阴影阶梯（4 档）---- */
  --sh-1: 0 1px 2px rgba(var(--c-text-rgb), .04), 0 1px 3px rgba(var(--c-text-rgb), .04);
  --sh-2: 0 4px 12px rgba(var(--c-text-rgb), .06), 0 2px 4px rgba(var(--c-text-rgb), .04);
  --sh-3: 0 12px 32px rgba(var(--c-text-rgb), .08), 0 4px 12px rgba(var(--c-text-rgb), .04);
  --sh-4: 0 24px 60px rgba(var(--c-text-rgb), .10), 0 8px 24px rgba(var(--c-text-rgb), .06);

  /* ---- 圆角（4 档）---- */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* ---- 间距阶梯（8 档，基于 4px 基线）---- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 100px;
  --sp-10: 160px;

  /* ---- Section 通用 padding（统一规范）---- */
  --sec-pad-desktop: var(--sp-9) 0;        /* 主 section：100/0 */
  --sec-pad-mobile:  var(--sp-8) 0;        /* 移动：64/0 (原 60) */
  --sec-pad-hero:    var(--sp-10) 0 var(--sp-9);  /* hero：160/0/100 */
  --sec-pad-hero-md: 130px 0 80px;         /* 中等屏 hero */
  --sec-pad-hero-sm: 110px 0 60px;         /* 移动 hero */

  /* ---- 容器宽度 ---- */
  --container: 1180px;

  /* ---- 动画时长（3 档）---- */
  --dur-fast:  .2s;
  --dur-base:  .3s;
  --dur-slow:  .8s;
  --ease-out:  cubic-bezier(.2, .7, .2, 1);

  /* ---- 字体 ---- */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont,
               'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  font-size: 15px;
  letter-spacing: 0.01em;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; }
img { max-width: 100%; display: block; }
::selection { background: var(--c-brand); color: #fff; }
:focus-visible {
  outline: 3px solid rgba(var(--c-brand-rgb), .45);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== 全局滚动入场 ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
  /* Safety: 1.5s 后不管 JS 怎么, 强制显示 (兜底 IntersectionObserver 不触发的情况) */
  animation: revealSafety 1.5s ease-out forwards;
}
@keyframes revealSafety {
  0%, 30%  { opacity: 0; transform: translateY(40px); }
  100%     { opacity: 1; transform: translateY(0); }
}
[data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
  animation: none;  /* JS 触发后, 关掉 safety, 走 transition */
}

/* ===== 顶部导航 ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--c-line);
  box-shadow: 0 1px 0 rgba(0,0,0,.02);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--c-text);
}
.nav__logo-mark {
  width: 28px; height: 28px;
  border-radius: 7px;
  display: grid; place-items: center;
  background: var(--c-text);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.nav__logo:hover .nav__logo-mark { transform: rotate(-12deg) scale(1.08); }
.nav__links {
  display: flex;
  gap: 28px;
  margin-left: 8px;
}
.nav__link {
  color: var(--c-text-3);
  font-size: 14px;
  font-weight: 500;
  transition: color .2s;
}
.nav__link:hover { color: var(--c-text); }
.nav__link.is-active { color: var(--c-text); }

/* 下拉菜单容器 */
.nav__item--dd { position: relative; display: inline-flex; align-items: center; }
.nav__link--dd {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  padding: 0;
  font: inherit;
  color: var(--c-text-3);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: color .2s;
}
.nav__link--dd:hover { color: var(--c-text); }
.nav__link--dd.is-active { color: var(--c-text); }
.nav__caret { transition: transform .25s cubic-bezier(.2,.7,.2,1); }
.nav__item--dd.is-open .nav__caret { transform: rotate(180deg); }

.nav__dd {
  position: absolute;
  top: calc(100% + 8px);
  left: -16px;
  min-width: 200px;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-3);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateY(-8px) scale(.96);
  transform-origin: top left;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s cubic-bezier(.2,.7,.2,1);
  z-index: 60;
}
.nav__item--dd.is-open .nav__dd {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.nav__dd-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-text-2);
  transition: background .15s, color .15s, transform .15s;
}
.nav__dd-item:hover {
  background: var(--c-bg-tint);
  color: var(--c-text);
  transform: translateX(2px);
}
.nav__dd-item.is-active {
  background: var(--c-bg-tint);
  color: var(--c-text);
  font-weight: 600;
}
.nav__dd-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .9), 0 0 0 4px currentColor;
}
.nav__dd-label { flex: 1; }
.nav__dd-arrow {
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .15s, transform .15s;
  color: var(--c-text-4);
}
.nav__dd-item:hover .nav__dd-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--c-text-2);
}
.nav__dd-divider {
  height: 1px;
  background: var(--c-line);
  margin: 4px 6px;
}
.nav__dd-item--special {
  background: linear-gradient(135deg, rgba(var(--c-brand-rgb), .06) 0%, rgba(124, 58, 237, .06) 100%);
  border: 1px solid rgba(var(--c-brand-rgb), .15);
  margin: 2px 0;
}
.nav__dd-item--special:hover {
  background: linear-gradient(135deg, rgba(var(--c-brand-rgb), .10) 0%, rgba(124, 58, 237, .10) 100%);
  border-color: rgba(var(--c-brand-rgb), .35);
}
.nav__dd-item--special .nav__dd-icon {
  display: grid; place-items: center;
  width: 22px; height: 22px;
  background: var(--c-bg);
  border: 1px solid rgba(var(--c-brand-rgb), .2);
  border-radius: 6px;
  color: var(--c-brand);
}
.nav__dd-item--special .nav__dd-label {
  font-weight: 600;
  background: var(--g-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav__dd-item--special.is-active {
  background: linear-gradient(135deg, rgba(var(--c-brand-rgb), .10) 0%, rgba(124, 58, 237, .10) 100%);
}
.nav__dd-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--c-brand);
  background: var(--c-brand-soft);
  padding: 1px 6px;
  border-radius: 999px;
  letter-spacing: .05em;
}

.nav__cta {
  margin-left: auto;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--c-text);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  transition: transform .2s, background .2s, box-shadow .2s;
}
.nav__cta:hover {
  background: var(--c-text-2);
  transform: translateY(-1px);
  box-shadow: var(--sh-2);
}
.nav__menu { display: none; font-size: 22px; color: var(--c-text); }

/* ===== 通用板块头 ===== */
.section__head {
  text-align: left;
  margin-bottom: 56px;
  max-width: 720px;
}
.section__head--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--c-brand);
  margin-bottom: 12px;
}
.section__title {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-text);
  margin-bottom: 16px;
  line-height: 1.15;
}
.section__desc {
  font-size: 16.5px;
  color: var(--c-text-2);
  line-height: 1.7;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 22px;
  border-radius: var(--r-md);
  font-size: 14.5px;
  font-weight: 600;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s, border-color .2s;
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-text);
  color: #fff;
  box-shadow: var(--sh-2);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--sh-3);
  background: var(--c-text-2);
}
.btn--ghost {
  background: var(--c-bg);
  color: var(--c-text);
  border: 1px solid var(--c-line-strong);
}
.btn--ghost:hover {
  transform: translateY(-1px);
  border-color: var(--c-text);
  box-shadow: var(--sh-1);
}

/* ===== HERO（主页） ===== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, #fafbfc 100%);
}
.hero__bg {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(var(--c-text-rgb), 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(var(--c-text-rgb), 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  animation: gridDrift 30s linear infinite;
}
@keyframes gridDrift {
  0%   { background-position: 0 0, 0 0; }
  100% { background-position: 56px 56px, 56px 56px; }
}
.hero__glow {
  position: absolute;
  width: 520px; height: 520px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .35;
  animation: float 14s ease-in-out infinite;
}
.hero__glow--1 {
  top: -120px; left: -100px;
  background: radial-gradient(circle, #93c5fd, transparent 60%);
}
.hero__glow--2 {
  bottom: -180px; right: -120px;
  background: radial-gradient(circle, #93c5fd, transparent 60%);
  opacity: .25;
  animation-delay: -7s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -30px) scale(1.05); }
  66%      { transform: translate(-30px, 20px) scale(.95); }
}

/* 3D 浮动小元素 */
.hero__floating {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  will-change: transform;
}
.hero__floating--1 {
  top: 22%; left: 8%;
  width: 64px; height: 64px;
  border: 1px solid rgba(var(--c-text-rgb), .08);
  background: rgba(255, 255, 255, .6);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  transform: rotate(15deg);
  animation: floatBox 8s ease-in-out infinite;
  box-shadow: 0 8px 24px rgba(var(--c-text-rgb), .06);
}
.hero__floating--1::after {
  content: '';
  position: absolute; inset: 12px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-brand-soft), transparent);
}
.hero__floating--2 {
  top: 60%; right: 6%;
  width: 48px; height: 48px;
  border: 1px solid rgba(var(--c-text-rgb), .08);
  background: rgba(255, 255, 255, .7);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  transform: rotate(-10deg);
  animation: floatBox 9s ease-in-out infinite reverse;
  box-shadow: 0 6px 20px rgba(var(--c-text-rgb), .05);
}
.hero__floating--3 {
  top: 40%; right: 14%;
  width: 28px; height: 28px;
  background: var(--c-brand);
  border-radius: 8px;
  transform: rotate(20deg);
  opacity: .7;
  animation: floatBox 7s ease-in-out infinite;
  box-shadow: 0 4px 16px rgba(var(--c-brand-rgb), .3);
}
@keyframes floatBox {
  0%, 100% { transform: translateY(0) rotate(var(--r, 0deg)); }
  50%      { transform: translateY(-20px) rotate(calc(var(--r, 0deg) + 5deg)); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--c-brand-soft);
  color: var(--c-brand);
  font-size: 12.5px;
  font-weight: 500;
  border: 1px solid rgba(var(--c-brand-rgb), .15);
  margin-bottom: 28px;
  animation: fadeUp .8s ease both;
}
.hero__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-brand);
  box-shadow: 0 0 0 0 rgba(var(--c-brand-rgb), .5);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(var(--c-brand-rgb), .5); }
  70% { box-shadow: 0 0 0 8px rgba(var(--c-brand-rgb), 0); }
  100% { box-shadow: 0 0 0 0 rgba(var(--c-brand-rgb), 0); }
}
.hero__title {
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-text);
  margin-bottom: 24px;
  animation: fadeUp .8s .1s ease both;
}
.hero__title-line { display: block; }
.hero__title-em {
  background: var(--g-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.hero__title-em:hover { transform: translateY(-2px); }
.hero__title-em--alt {
  background: var(--c-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-text-2);
  animation: fadeUp .8s .2s ease both;
}
.hero__sub strong { color: var(--c-text); font-weight: 700; }
.hero__cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 72px;
  animation: fadeUp .8s .3s ease both;
}
.hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 32px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-2);
  animation: fadeUp .8s .4s ease both;
}
.hero__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  position: relative;
}
.hero__stat + .hero__stat::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 28px;
  background: var(--c-line);
}
.hero__stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -.02em;
  line-height: 1;
  display: inline-block;
  font-variant-numeric: tabular-nums;
}
.hero__stat-label {
  font-size: 12.5px;
  color: var(--c-text-3);
  font-weight: 500;
  margin-top: 4px;
}
.hero__scroll {
  margin-top: 56px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--c-text-4);
  font-size: 11.5px;
  letter-spacing: .15em;
  text-transform: uppercase;
  animation: fadeUp .8s .5s ease both;
}
.hero__scroll-line {
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, var(--c-text-4), transparent);
  animation: scrollLine 1.6s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 分类导航（主页） ===== */
.cats {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg);
}
.cats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  perspective: 1500px;
}
.cat-card {
  position: relative;
  display: block;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 28px 24px;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .25s;
  overflow: hidden;
  isolation: isolate;
  transform-style: preserve-3d;
  will-change: transform;
}
.cat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--c-brand-soft);
  opacity: 0;
  transition: opacity .3s;
  z-index: -1;
}
.cat-card__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .4s;
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    var(--c-brand) 0%,
    transparent 60%
  );
  opacity: 0;
  z-index: -1;
}
.cat-card:hover { border-color: var(--c-brand); }
.cat-card:hover::before { opacity: .08; }
.cat-card:hover .cat-card__glow { opacity: .12; }
.cat-card__icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  margin-bottom: 16px;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), background .3s, border-color .3s, color .3s;
  transform: translateZ(30px);
  color: var(--c-text);
}
.cat-card__icon svg { width: 24px; height: 24px; }
.cat-card:hover .cat-card__icon {
  background: var(--c-text);
  border-color: var(--c-text);
  color: #fff;
  transform: translateZ(50px) rotate(-6deg);
}
.cat-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  transform: translateZ(15px);
}
.cat-card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
}
.cat-card__count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-3);
  background: var(--c-bg-tint);
  padding: 3px 8px;
  border-radius: 999px;
}
.cat-card__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-text-2);
  margin-bottom: 16px;
  transform: translateZ(8px);
}
.cat-card__arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-brand);
  transition: gap .2s;
  transform: translateZ(20px);
}
.cat-card__arrow svg { width: 14px; height: 14px; }
.cat-card:hover .cat-card__arrow { gap: 8px; }

/* ===== 主页：关于我 ===== */
.about {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg);
  border-top: 1px solid var(--c-line);
}
.about__intro {
  max-width: 780px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-text-2);
  margin-bottom: 56px;
}
.about__intro p { margin-bottom: 14px; }
.about__intro p:last-child { margin-bottom: 0; }
.about__intro strong { color: var(--c-text); font-weight: 700; }
.about__intro em {
  font-style: normal;
  font-weight: 700;
  color: var(--c-text);
  background: linear-gradient(transparent 60%, rgba(var(--c-brand-rgb), .18) 60%);
  padding: 0 4px;
}
.about__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.about-hl {
  position: relative;
  padding: 24px 22px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.about-hl:hover {
  transform: translateY(-3px);
  border-color: var(--c-text);
  box-shadow: var(--sh-2);
}
.about-hl__icon {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  background: var(--c-text);
  border-radius: 10px;
  color: #fff;
  margin-bottom: 18px;
}
.about-hl__icon svg { width: 20px; height: 20px; }
.about-hl__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: .12em;
  margin-bottom: 8px;
}
.about-hl h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 8px;
}
.about-hl p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-text-2);
}

@media (max-width: 1024px) {
  .about__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .about { padding: var(--sec-pad-mobile); }
  .about__grid { grid-template-columns: 1fr; }
  .about__intro { font-size: 15px; }
}

/* ===== 主页：能力速览 ===== */
.skills {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.skills__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  perspective: 1200px;
}
.skill-card {
  position: relative;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 24px 22px;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .3s;
  transform-style: preserve-3d;
  overflow: hidden;
  will-change: transform;
}
.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    rgba(var(--c-brand-rgb), .1) 0%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-3);
  border-color: var(--c-line-strong);
}
.skill-card:hover::before { opacity: 1; }
.skill-card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-brand);
  font-weight: 600;
  margin-bottom: 12px;
  transform: translateZ(20px);
}
.skill-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
  transform: translateZ(12px);
}
.skill-card__desc {
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.65;
  transform: translateZ(6px);
}

/* ===== 分类页头部 ===== */
.cat-hero {
  position: relative;
  padding: var(--sec-pad-hero);
  background: linear-gradient(180deg, #fff 0%, var(--cat-bg, var(--c-bg-soft)) 100%);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}
.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(var(--c-text-rgb), 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(var(--c-text-rgb), 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at left top, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at left top, #000 20%, transparent 70%);
  pointer-events: none;
}
.cat-hero__inner {
  position: relative;
  z-index: 1;
}
.cat-hero__back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--c-text-3);
  font-weight: 500;
  margin-bottom: 20px;
  transition: color .2s, gap .2s, transform .2s;
}
.cat-hero__back:hover { color: var(--c-text); gap: 8px; transform: translateX(-2px); }
.cat-hero__head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  perspective: 1000px;
}
.cat-hero__icon {
  width: 72px; height: 72px;
  display: grid; place-items: center;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: 16px;
  box-shadow: var(--sh-2);
  transition: transform .25s ease;
  transform-style: preserve-3d;
  will-change: transform;
}
.cat-hero__icon svg { width: 36px; height: 36px; }
.cat-hero__title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-text);
  line-height: 1.15;
  margin-bottom: 4px;
}
.cat-hero__count {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-text-3);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.cat-hero__count span[data-count] { color: var(--c-text); font-weight: 700; }
.cat-hero__desc {
  font-size: 17px;
  color: var(--c-text-2);
  line-height: 1.7;
  max-width: 720px;
}

/* ===== 作品详情卡片（分类页）===== */
.works-list {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg);
  perspective: 1500px;
}
.work-detail {
  position: relative;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  padding: 32px;
  margin-bottom: 28px;
  transition: box-shadow .4s, border-color .3s;
  isolation: isolate;
}
.work-detail:hover {
  box-shadow: 0 30px 60px -20px rgba(var(--c-text-rgb), .15), 0 10px 30px -10px rgba(var(--c-text-rgb), .08);
  border-color: var(--c-line-strong);
}
.work-detail__inner {
  position: relative;
}
.work-detail__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .4s;
  border-radius: var(--r-xl);
  mix-blend-mode: multiply;
  z-index: 0;
}
.work-detail:hover .work-detail__glow { opacity: 1; }

.work-detail__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--c-line);
  position: relative;
  z-index: 1;
  transform: translateZ(0);
}
.work-detail__icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  flex-shrink: 0;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), background .3s, border-color .3s;
  transform: translateZ(40px);
  color: var(--c-brand);
}
.work-detail__icon svg { width: 28px; height: 28px; }
.work-detail:hover .work-detail__icon {
  background: var(--c-bg);
  border-color: var(--c-brand);
  transform: translateZ(60px) rotate(-8deg);
}
.work-detail__head-text {
  flex: 1;
  min-width: 0;
  transform: translateZ(15px);
}
.work-detail__port {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-4);
  background: var(--c-bg-tint);
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  display: inline-block;
  margin-bottom: 6px;
}
.work-detail__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 4px;
  transition: color .25s;
}
.work-detail:hover .work-detail__title { color: var(--c-text); }
.work-detail__desc {
  font-size: 14.5px;
  color: var(--c-text-2);
  line-height: 1.6;
}
.work-detail__badge {
  flex-shrink: 0;
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--c-text-3);
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: .04em;
  transform: translateZ(20px);
}
.work-detail__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.work-detail__block { transform: translateZ(8px); }
.work-detail__block-title {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-text-3);
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.work-detail__block-title::before {
  content: '';
  width: 14px; height: 2px;
  background: var(--c-brand);
  border-radius: 2px;
}
.work-detail__problem {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-text-2);
}
.work-detail__features {
  list-style: none;
}
.work-detail__features li {
  position: relative;
  padding: 6px 0 6px 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-2);
}
.work-detail__features li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--c-brand);
  border: 2px solid var(--c-brand);
  opacity: .25;
  transition: opacity .25s, transform .25s;
}
.work-detail__features li::after {
  content: '';
  position: absolute;
  left: 4px; top: 16px;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--c-brand);
  opacity: .8;
}
.work-detail:hover .work-detail__features li::before {
  opacity: 1;
  transform: scale(1.1);
}
.work-detail__media {
  margin-top: 4px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-4);
  font-size: 13px;
  position: relative;
  z-index: 1;
  /* GIF 本身帧数较多，避免强制 GPU 合成后出现跳帧或撕裂感。 */
  transform: none;
}
.work-detail__media--empty {
  border-style: dashed;
  border-color: var(--c-line-strong);
  background:
    linear-gradient(135deg, transparent 49%, var(--c-line) 49%, var(--c-line) 51%, transparent 51%) 0 0 / 16px 16px,
    var(--c-bg-tint);
}
.work-detail__media-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 40px 20px;
  text-align: center;
  pointer-events: none;
}
.work-detail__media-link.is-empty + .work-detail__media-placeholder { display: none; }
.work-detail__media--empty .work-detail__media-link.is-empty ~ .work-detail__media-placeholder { display: flex; }
.work-detail__media .work-detail__media-link:not(.is-empty) ~ .work-detail__media-placeholder { display: none; }
.work-detail__media-placeholder-icon {
  display: grid; place-items: center;
  width: 56px; height: 56px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  color: var(--c-text-3);
}
.work-detail__media-placeholder-icon svg { width: 28px; height: 28px; }
.work-detail__media-placeholder-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-2);
}
.work-detail__media-placeholder-name {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-brand);
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  padding: 4px 10px;
  border-radius: 6px;
}
.work-detail__media-placeholder-hint {
  font-size: 12px;
  color: var(--c-text-3);
}
.work-detail__media-placeholder-hint code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--c-text-2);
}
.work-detail__media-link {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--c-bg-tint);
}
.work-detail__carousel-item.is-broken {
  display: flex !important;
  background: var(--c-bg-tint);
  min-height: 240px;
}
.work-detail__carousel-item.is-broken img { display: none !important; }
.work-detail__media img {
  width: 100%;
  height: auto;
  display: block;
  transform: none;
  -webkit-transform: none;
  transition: none;
}
.work-detail__media:hover img {
  transform: none;
}

/* ===== 轮播 ===== */
.work-detail__carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  width: 100%;
  min-height: 100px;
  background: var(--c-bg-tint);
}
.work-detail__carousel:has(.work-detail__media-placeholder[style*="flex"]) {
  min-height: 240px;
}
.work-detail__carousel-item {
  width: 100%;
  position: relative;
}
.work-detail__carousel-item.is-active {
  display: block;
}
.work-detail__carousel-item:not(.is-active) {
  display: none;
}
.work-detail__carousel-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: none;
}
.work-detail__carousel:hover img {
  transform: none;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,.85);
  color: var(--c-brand);
  font-size: 22px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background .2s, transform .2s;
  backdrop-filter: blur(4px);
}
.carousel-btn:hover {
  background: #fff;
  transform: translateY(-50%) scale(1.1);
}
.carousel-btn--prev { left: 10px; }
.carousel-btn--next { right: 10px; }
.carousel-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}
.carousel-dot {
  width: 6px;
  height: 6px;
  padding: 0;
  border-radius: 50%;
  background: rgba(255,255,255,.45);
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.carousel-dot.is-active {
  background: #fff;
  transform: scale(1.3);
}

.work-detail__foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 16px;
  margin-top: 16px;
  border-top: 1px dashed var(--c-line);
  position: relative;
  z-index: 1;
}
.work-detail__tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.work-detail__tag {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--c-text-3);
  padding: 3px 9px;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  transition: background .2s, color .2s, border-color .2s;
}
.work-detail:hover .work-detail__tag {
  background: var(--c-bg);
  border-color: var(--c-line-strong);
}
.work-detail__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--c-brand);
  font-weight: 600;
}
.work-detail__status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-brand);
  box-shadow: 0 0 0 3px rgba(var(--c-brand-rgb), .18);
  animation: pulse 2s infinite;
}

/* ===== 联系区（分类页底） ===== */
.contact-strip {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  text-align: center;
}
.contact-strip__inner {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 36px 48px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-2);
  max-width: 720px;
  width: 100%;
}
.contact-strip__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
}
.contact-strip__desc {
  font-size: 14.5px;
  color: var(--c-text-2);
  margin-bottom: 8px;
}
.contact-strip__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: -.01em;
}

/* ===== 联系页 ===== */
.contact-page {
  padding: 160px 0 100px;
  background: var(--c-bg);
}
.contact-page__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.contact-page__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 32px 28px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  transition: transform .25s, box-shadow .25s, border-color .25s;
  cursor: pointer;
  overflow: hidden;
}
a.contact-page__card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--g-brand);
  opacity: 0;
  transition: opacity .3s;
  z-index: -1;
}
a.contact-page__card:hover {
  transform: translateY(-3px);
  border-color: var(--c-brand);
  box-shadow: var(--sh-3);
}
.contact-page__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  margin-bottom: 4px;
  color: var(--c-brand);
}
.contact-page__icon svg { width: 24px; height: 24px; }
.contact-page__label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--c-text-3);
}
.contact-page__value {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
}
.contact-page__hint {
  font-size: 12.5px;
  color: var(--c-text-3);
  margin-top: 4px;
}
.contact-page__static { cursor: default; }
.contact-process {
  max-width: 840px;
  margin: 64px auto 0;
  padding: 32px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  text-align: center;
}
.contact-process__title {
  font-size: 19px;
  font-weight: 750;
  color: var(--c-text);
  margin-bottom: 20px;
}
.contact-process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  list-style: none;
}
.contact-process__step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
}
.contact-process__step span {
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
}
.contact-process__step strong { font-size: 14px; color: var(--c-text); }

/* ===== 底部 ===== */
.footer {
  padding: 32px 0;
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  color: var(--c-text-3);
  font-size: 13px;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.footer__sep { color: var(--c-text-4); }

/* ===== 回到顶部 ===== */
.totop {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--c-text);
  color: #fff;
  font-size: 18px;
  display: grid; place-items: center;
  box-shadow: var(--sh-3);
  z-index: 40;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .3s, transform .3s, background .2s;
}
.totop.is-show { opacity: 1; transform: translateY(0); }
.totop:hover { background: var(--c-brand); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .cats__grid { grid-template-columns: repeat(2, 1fr); }
  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .contact-page__cards { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); padding: 24px; }
  .hero__stat + .hero__stat::before { display: none; }
  .hero__stat:nth-child(odd)::after {
    content: '';
    position: absolute;
    right: -8px; top: 50%;
    transform: translateY(-50%);
    width: 1px; height: 28px;
    background: var(--c-line);
  }
  .work-detail__body { grid-template-columns: 1fr; gap: 20px; }
  .contact-process__steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .work-detail__media,
  .work-detail__media-link { min-height: 0; }
  .work-detail__carousel { min-height: 100px; }
  .work-detail__media img { max-height: 70vh; object-fit: contain; width: auto; max-width: 100%; }
  .work-detail__carousel { margin: 0 -20px; }
  .work-detail__carousel-item.is-broken { min-height: 200px; }
  .nav__inner { padding: 0 20px; gap: 12px; }
  .nav__links { display: none; }
  .nav__links.is-mobile-open {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, .98);
    border-top: 1px solid var(--c-line);
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--sh-3);
  }
  .nav__links.is-mobile-open .nav__link { min-height: 40px; }
  .nav__links.is-mobile-open .nav__item--dd { display: block; }
  .nav__links.is-mobile-open .nav__dd {
    position: static;
    width: 100%;
    margin-top: 6px;
    box-shadow: none;
  }
  .nav__menu { display: block; margin-left: auto; }
  .nav__cta { display: none; }
  .hero { padding: var(--sec-pad-hero-md); }
  .hero__title { font-size: 38px; }
  .hero__sub { font-size: 15.5px; }
  .hero__cta { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .hero__stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cats__grid { grid-template-columns: 1fr; }
  .skills__grid { grid-template-columns: 1fr; }
  .contact-process { margin-top: 40px; padding: 24px 16px; }
  .contact-process__steps { grid-template-columns: 1fr; }
  .cat-hero { padding: var(--sec-pad-hero-sm); }
  .cat-hero__head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .cat-hero__icon { width: 56px; height: 56px; }
  .cat-hero__icon svg { width: 28px; height: 28px; }
  .work-detail { padding: 20px; }
  .work-detail__head { flex-wrap: wrap; }
  .cats, .works-list, .contact-page, .contact-strip { padding: var(--sec-pad-mobile); }
  .totop { bottom: 18px; right: 18px; }
  /* 移动端禁用 3D 视差, 防止误触 */
  .work-detail__inner, .cat-card, .skill-card, .cat-hero__icon {
    transform: none !important;
  }
}

/* ===== 减弱动效 (无障碍) ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .work-detail__inner, .cat-card, .skill-card, .cat-hero__icon {
    transform: none !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .page-bg__shape { animation: none !important; }
}

/* ============================================================
   整页背景特效
   - mouse-following 大光斑 (在内容之上, 但低不透明度, 不影响阅读)
   - SVG 几何装饰浮动
   - 细网格 + 噪点
   ============================================================ */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: 40;  /* 在内容之上, nav 之下 */
  pointer-events: none;
  overflow: hidden;
}
.page-bg__cursor,
.page-bg__cursor--2 {
  position: absolute;
  left: 0; top: 0;
  width: 720px; height: 720px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  transition: opacity .5s ease;
  will-change: transform;
}
.page-bg__cursor.is-active { opacity: .55; }
.page-bg__cursor--2.is-active { opacity: .35; }
.page-bg__cursor {
  background: radial-gradient(circle, rgba(var(--c-brand-rgb), 0.30) 0%, rgba(var(--c-brand-rgb), 0.08) 30%, transparent 60%);
}
.page-bg__cursor--2 {
  background: radial-gradient(circle, rgba(var(--c-brand-rgb), 0.22) 0%, rgba(var(--c-brand-rgb), 0.05) 30%, transparent 60%);
  width: 540px; height: 540px;
}

.page-bg__shape {
  position: absolute;
  width: 80px; height: 80px;
  color: rgba(var(--c-text-rgb), 0.08);
  animation: shapeFloat 16s ease-in-out infinite;
  will-change: transform;
}
.page-bg__shape--1 { top: 18%; left: 6%;  width: 90px;  height: 90px;  animation-delay:  0s; }
.page-bg__shape--2 { top: 38%; right: 8%; width: 70px;  height: 70px;  animation-delay: -3s; }
.page-bg__shape--3 { top: 64%; left: 10%; width: 60px;  height: 60px;  animation-delay: -7s; }
.page-bg__shape--4 { top: 78%; right: 12%;width: 110px; height: 110px; animation-delay: -10s; }
.page-bg__shape--5 { top: 12%; left: 50%; width: 16px;  height: 16px;  color: rgba(var(--c-brand-rgb), .35); animation-delay: -5s; }
@keyframes shapeFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33%      { transform: translate(20px, -28px) rotate(8deg); }
  66%      { transform: translate(-18px, 16px) rotate(-6deg); }
}

.page-bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(var(--c-text-rgb), 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(var(--c-text-rgb), 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  opacity: .5;
}

.page-bg__noise {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .05;
  pointer-events: none;
}

/* nav 在 page-bg 之上 */
.nav { z-index: 50; }

/* 触屏隐藏光斑 */
@media (hover: none) {
  .page-bg__cursor, .page-bg__cursor--2 { display: none; }
}


/* ============================================================
   架构图页面 (architecture.html)  — CSS Grid 布局版
   ============================================================ */
.arch-hero {
  position: relative;
  padding: var(--sec-pad-hero);
  background: linear-gradient(180deg, #fff 0%, #fafbfc 100%);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}
.arch-hero__inner { max-width: 720px; }
.arch-hero__title {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-text);
  line-height: 1.15;
  margin: 12px 0 20px;
}
.arch-hero__sub {
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-text-2);
  margin-bottom: 32px;
}
.arch-hero__sub strong { color: var(--c-text); font-weight: 700; }
.arch-hero__meta {
  list-style: none;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  padding: 20px 28px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-1);
}
.arch-hero__meta li { font-size: 14px; color: var(--c-text-3); }
.arch-hero__meta strong {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  color: var(--c-brand);
  margin-right: 4px;
}


/* ============================================================
   核心理念 (Why): 3 大死结
   ============================================================ */
.arch-why {
  padding: 100px 0;
  background: var(--c-bg);
  border-top: 1px solid var(--c-line);
}
.arch-why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.arch-why-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--r-xl);
  border: 1px solid var(--c-line);
  background: var(--c-bg);
  overflow: hidden;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .3s;
  isolation: isolate;
}
.arch-why-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c, var(--c-brand-soft)) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .3s;
  z-index: -1;
}
.arch-why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-3);
  border-color: var(--c, var(--c-brand));
}
.arch-why-card:hover::before { opacity: .08; }
.arch-why-card--blue   { --c: var(--c-brand); }
.arch-why-card--purple { --c: var(--c-purple); }
.arch-why-card--green  { --c: var(--c-green); }
.arch-why-card__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  color: var(--c);
  margin-bottom: 18px;
}
.arch-why-card__icon svg { width: 22px; height: 22px; }
.arch-why-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-text-3);
  letter-spacing: .12em;
  margin-bottom: 6px;
}
.arch-why-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.arch-why-card > p {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 16px;
}
.arch-why-card__fix {
  padding: 16px;
  background: var(--c-bg-soft);
  border-left: 3px solid var(--c);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.arch-why-card__fix-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--c);
  letter-spacing: .12em;
  margin-bottom: 6px;
}
.arch-why-card__fix p {
  font-size: 13.5px;
  color: var(--c-text);
  line-height: 1.7;
}
.arch-why-card__fix p strong { color: var(--c); }
.arch-why-card__fix p em { font-style: normal; color: var(--c-text-3); }

/* ============================================================
   OpenClaw 多 Agent 调度架构
   ============================================================ */
.arch-agents {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--c-bg-soft) 0%, var(--c-bg) 100%);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.arch-agents-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 980px;
  margin: 0 auto;
}
/* 统一层卡片：4 层同款（白底 + 品牌蓝左色条） */
.arch-agents-layer {
  position: relative;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 22px 26px 22px 30px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.arch-agents-layer::before {
  content: '';
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 4px;
  background: var(--c-brand);
  border-radius: 0 4px 4px 0;
}
.arch-agents-layer:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-2);
  border-color: rgba(var(--c-brand-rgb), .35);
}
.arch-agents-layer__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}
/* 4 层 badge 完全同款：白底 + 品牌蓝边 + 蓝字 */
.arch-agents-layer__badge {
  flex-shrink: 0;
  display: grid; place-items: center;
  width: 38px; height: 38px;
  background: var(--c-bg);
  color: var(--c-brand);
  border: 1.5px solid var(--c-brand);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .04em;
  transition: background .25s, color .25s, box-shadow .25s;
}
.arch-agents-layer:hover .arch-agents-layer__badge {
  background: var(--c-brand);
  color: #fff;
  box-shadow: 0 0 0 3px rgba(var(--c-brand-rgb), .15);
}
/* 兼容旧 --hot/--solid 类名（架构页用 .arch-agents-layer__badge--hot / --solid） */
.arch-agents-layer__badge--hot,
.arch-agents-layer__badge--solid {
  background: var(--c-bg);
  color: var(--c-brand);
  border: 1.5px solid var(--c-brand);
  animation: none;
}
.arch-agents-layer__head h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 2px;
}
.arch-agents-layer__head p {
  font-size: 13px;
  color: var(--c-text-2);
  line-height: 1.6;
}
/* L2 移除深色，保持白底 */
.arch-agents-layer--orchestrator {
  background: var(--c-bg);
  border-color: rgba(var(--c-brand-rgb), .35);
  color: var(--c-text);
}
.arch-agents-layer--orchestrator h3 { color: var(--c-text); }
.arch-agents-layer--orchestrator p { color: var(--c-text-2); }
.arch-agents-arrow {
  height: 32px;
  display: grid; place-items: center;
  color: var(--c-brand);
  position: relative;
}
.arch-agents-arrow::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--c-line), var(--c-brand) 60%, transparent);
  transform: translateX(-50%);
}
.arch-agents-arrow svg {
  background: var(--c-bg);
  padding: 4px;
  z-index: 1;
  transform: rotate(90deg);
  color: var(--c-brand);
}
/* A. 数据流光点：3 个箭头接力跑动 */
.arch-agents-arrow::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 5px;
  height: 5px;
  background: var(--c-brand);
  border-radius: 50%;
  box-shadow:
    0 0 6px 1.5px rgba(var(--c-brand-rgb), .75),
    0 0 14px 4px rgba(var(--c-brand-rgb), .25);
  transform: translateX(-50%);
  z-index: 4;
  animation: dataFlow 2.4s cubic-bezier(.4, 0, .6, 1) infinite;
  pointer-events: none;
}
.arch-agents-arrow:nth-of-type(1)::after { animation-delay: 0s; }
.arch-agents-arrow:nth-of-type(2)::after { animation-delay: 0.8s; }
.arch-agents-arrow:nth-of-type(3)::after { animation-delay: 1.6s; }
@keyframes dataFlow {
  0%   { opacity: 0; top: -4px; }
  12%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { opacity: 0; top: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  .arch-agents-arrow::after { animation: none; opacity: 0; }
}
.arch-agents-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.arch-agents-chip {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--c-text-2);
  background: rgba(var(--c-brand-rgb), .06);
  border: 1px solid rgba(var(--c-brand-rgb), .18);
  padding: 5px 12px;
  border-radius: 999px;
  transition: background .2s, color .2s, border-color .2s;
}
.arch-agents-layer--users:hover .arch-agents-chip {
  background: rgba(var(--c-brand-rgb), .12);
  color: var(--c-brand);
  border-color: rgba(var(--c-brand-rgb), .35);
}
/* OpenClaw Orchestrator 内部 core：黑白反转（白底黑字，黑边黑 tag） */
.arch-agents-core {
  position: relative;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
  background: var(--c-bg);
  border: 1.5px solid var(--c-text);
  border-radius: var(--r-lg);
  box-shadow:
    0 8px 24px rgba(var(--c-text-rgb), .10),
    0 0 0 0 rgba(var(--c-text-rgb), 0);
  animation: coreBreathe 3.2s ease-in-out infinite;
}
/* B. OpenClaw 呼吸光晕：box-shadow 向外发散（AI 思考感） */
@keyframes coreBreathe {
  0%, 100% {
    box-shadow:
      0 8px 24px rgba(var(--c-text-rgb), .10),
      0 0 0 0 rgba(var(--c-text-rgb), 0);
  }
  50% {
    box-shadow:
      0 8px 24px rgba(var(--c-text-rgb), .12),
      0 0 28px 6px rgba(var(--c-text-rgb), .22);
  }
}
@media (prefers-reduced-motion: reduce) {
  .arch-agents-core { animation: none; }
}
.arch-agents-core__icon {
  display: grid; place-items: center;
  width: 56px; height: 56px;
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  color: var(--c-text);
}
.arch-agents-core__icon svg { width: 28px; height: 28px; }
.arch-agents-core__text { flex: 1; }
.arch-agents-core__text strong {
  display: block;
  font-size: 18px;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 2px;
  letter-spacing: -.01em;
}
.arch-agents-core__text span {
  font-size: 13px;
  color: var(--c-text-2);
}
.arch-agents-core__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: #fff;
  background: var(--c-text);
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: .04em;
}
.arch-agents-biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.arch-agents-biz {
  position: relative;
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-bg-soft);
  transition: all .25s;
  cursor: default;
  overflow: hidden;
}
/* C. 6 个业务 Agent 同步心跳：左边色条随 L2 节奏亮起（强化 L2→L3 调度逻辑） */
.arch-agents-biz::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-brand);
  border-radius: 3px 0 0 3px;
  opacity: 0.35;
  transition: opacity .25s, box-shadow .25s, width .25s;
  animation: bizHeartbeat 3.2s ease-in-out infinite;
}
@keyframes bizHeartbeat {
  0%, 100% { opacity: 0.35; box-shadow: 0 0 0 0 rgba(var(--c-brand-rgb), 0); }
  50%      { opacity: 1;    box-shadow: 0 0 10px 1px rgba(var(--c-brand-rgb), .55); }
}
.arch-agents-biz:hover::before {
  animation-play-state: paused;
  opacity: 1;
  width: 4px;
  box-shadow: 0 0 14px 2px rgba(var(--c-brand-rgb), .7);
}
@media (prefers-reduced-motion: reduce) {
  .arch-agents-biz::before { animation: none; opacity: 0.6; }
}
.arch-agents-biz:hover {
  border-color: rgba(var(--c-brand-rgb), .35);
  background: var(--c-bg);
  transform: translateY(-2px);
  box-shadow: var(--sh-1);
}
.arch-agents-biz[data-biz]              { --c: var(--c-brand); }
.arch-agents-biz__icon {
  display: grid; place-items: center;
  width: 32px; height: 32px;
  background: rgba(var(--c-brand-rgb), .08);
  border: 1px solid rgba(var(--c-brand-rgb), .18);
  border-radius: 8px;
  color: var(--c-brand);
  margin-bottom: 10px;
}
.arch-agents-biz__icon svg { width: 18px; height: 18px; }
.arch-agents-biz__name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 2px;
}
.arch-agents-biz__port {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-brand);
  font-weight: 600;
  margin-bottom: 4px;
  letter-spacing: .04em;
}
.arch-agents-biz__desc {
  font-size: 12px;
  color: var(--c-text-3);
  line-height: 1.5;
}
.arch-agents-subs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.arch-agents-subs code {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-2);
  background: rgba(var(--c-brand-rgb), .06);
  border: 1px solid rgba(var(--c-brand-rgb), .18);
  padding: 4px 10px;
  border-radius: 6px;
}
.arch-agents-subs code::before { content: ':'; opacity: .5; margin-right: 2px; }

/* ============================================================
   升级的 HERO (AI + ERP 双引擎)
   ============================================================ */
.arch-hero {
  position: relative;
  padding: var(--sec-pad-hero);
  background: linear-gradient(180deg, #fff 0%, var(--c-bg-soft) 100%);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}
.arch-hero::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 600px;
  background:
    radial-gradient(circle at 30% 50%, rgba(var(--c-brand-rgb), 0.10) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.10) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}
.arch-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
}
.arch-hero__title {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 12px 0 24px;
  color: var(--c-text);
}
.arch-hero__title-ai {
  background: var(--g-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  padding: 0 4px;
}
.arch-hero__title-erp {
  background: var(--c-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  padding: 0 4px;
}
.arch-hero__title-sub {
  display: block;
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 700;
  color: var(--c-text-2);
  margin-top: 8px;
  letter-spacing: -.01em;
}
.arch-hero__sub {
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-text-2);
  margin-bottom: 36px;
  max-width: 780px;
}
.arch-hero__sub strong { color: var(--c-text); font-weight: 700; }
.arch-hero__value {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.arch-hero__value li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-1);
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.arch-hero__value li:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-2);
  border-color: var(--c, var(--c-line-strong));
}
.arch-hero__value-icon {
  flex-shrink: 0;
  display: grid; place-items: center;
  width: 40px; height: 40px;
  background: color-mix(in srgb, var(--c) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
  border-radius: 10px;
  color: var(--c);
}
.arch-hero__value-icon svg { width: 20px; height: 20px; }
.arch-hero__value li > div { display: flex; flex-direction: column; gap: 2px; }
.arch-hero__value strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
}
.arch-hero__value span {
  font-size: 13px;
  color: var(--c-text-3);
  line-height: 1.5;
}

/* 5 条设计思路第 5 条高亮 (AI 优先) */
.arch-philo-card--ai {
  background: linear-gradient(135deg, rgba(var(--c-brand-rgb), 0.04) 0%, rgba(124, 58, 237, 0.04) 100%);
  border-color: rgba(var(--c-brand-rgb), 0.2);
  grid-column: 1 / -1;
}
.arch-philo-card--ai:hover {
  border-color: rgba(var(--c-brand-rgb), 0.5);
  box-shadow: 0 20px 50px -12px rgba(var(--c-brand-rgb), .15);
}
.arch-philo-card--ai .arch-philo-card__num {
  color: var(--c-brand);
  font-size: 14px;
}
.arch-philo-card--ai h3 strong { color: var(--c-brand); }

/* 响应式 */
@media (max-width: 1024px) {
  .arch-why-grid { grid-template-columns: 1fr; }
  .arch-agents-biz-grid { grid-template-columns: repeat(2, 1fr); }
  .arch-hero__value { grid-template-columns: 1fr; }
  .arch-hero__title { font-size: clamp(32px, 5vw, 48px); }
}
@media (max-width: 720px) {
  .arch-why, .arch-agents { padding: 60px 0; }
  .arch-agents-biz-grid { grid-template-columns: 1fr; }
  .arch-agents-core { flex-direction: column; align-items: flex-start; gap: 14px; }
  .arch-agents-core__tag { align-self: stretch; text-align: center; }
  .arch-hero { padding: var(--sec-pad-hero-sm); }
  .arch-hero__title { font-size: 32px; }
  .arch-hero__title-sub { font-size: 18px; }
  .arch-philo-card--ai { grid-column: auto; }
}
/* ============================================================
   系统全景图 (What): 6 模块 + 1 中枢
   ============================================================ */
.arch-diagram-section {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg);
}
.arch-canvas {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 1fr 60px 1fr 60px 1fr;
  grid-template-rows: auto auto auto;
  align-items: stretch;
  column-gap: 0;
  row-gap: 16px;
}
.arch-canvas > .arch-center { margin-top: 8px; }

.arch-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 0 4px;
  transition: all .3s;
}
.arch-flow__icon {
  font-size: 22px;
  color: var(--c-line-strong);
  font-weight: 700;
  line-height: 1;
  transition: color .3s, transform .3s;
}
.arch-flow__label {
  font-size: 11px;
  color: var(--c-text-3);
  font-weight: 500;
  white-space: nowrap;
  transition: color .3s;
  text-align: center;
}
.arch-flow.is-hot .arch-flow__icon { color: var(--c-brand); transform: scale(1.25); }
.arch-flow.is-hot .arch-flow__label { color: var(--c-brand); font-weight: 600; }

.arch-node {
  position: relative;
  background: var(--c-bg);
  border: 2px solid var(--c-line);
  border-radius: 16px;
  padding: 20px 22px;
  cursor: pointer;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), border-color .3s, box-shadow .3s;
  z-index: 2;
}
.arch-node:hover, .arch-node.is-hot {
  border-color: var(--c-brand);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px -12px rgba(var(--c-brand-rgb), .25);
}
.arch-node__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-text-3);
  letter-spacing: .12em;
  margin-bottom: 4px;
}
.arch-node__title {
  font-size: 19px;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 6px;
}
.arch-node__desc {
  font-size: 13px;
  color: var(--c-text-2);
  line-height: 1.55;
  margin-bottom: 12px;
}
.arch-node__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c);
  padding: 3px 9px;
  background: color-mix(in srgb, var(--c) 12%, transparent);
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
}

.arch-center { display: flex; justify-content: center; }
.arch-center__core {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  padding: 18px 32px;
  background: var(--c-bg);
  border: 3px solid var(--c-text);
  border-radius: 80px;
  box-shadow: 0 20px 50px -12px rgba(var(--c-text-rgb), .25);
  cursor: pointer;
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
  animation: archCenterPulse 4s ease-in-out infinite;
}
@keyframes archCenterPulse {
  0%, 100% { box-shadow: 0 20px 50px -12px rgba(var(--c-text-rgb), .25), 0 0 0 0 rgba(var(--c-text-rgb), 0); }
  50%      { box-shadow: 0 20px 50px -12px rgba(var(--c-text-rgb), .35), 0 0 0 6px rgba(var(--c-text-rgb), .06); }
}
.arch-center:hover .arch-center__core, .arch-center.is-hot .arch-center__core { transform: scale(1.05); }
.arch-center__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  background: var(--c-text);
  color: #fff;
  border-radius: 12px;
  flex-shrink: 0;
}
.arch-center__text { text-align: left; }
.arch-center__label {
  font-size: 18px;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -.01em;
}
.arch-center__sub { font-size: 12px; color: var(--c-text-3); margin-top: 2px; }
.arch-center__port {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text);
  background: var(--c-bg-tint);
  border: 1px solid var(--c-line);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ============================================================
   业务提效 (Impact): 6 模块提效对比
   ============================================================ */
.arch-impact {
  padding: 100px 0;
  background: var(--c-bg);
  border-top: 1px solid var(--c-line);
}
.arch-impact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.arch-impact-card {
  position: relative;
  padding: 26px 28px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .3s;
  overflow: hidden;
  isolation: isolate;
}
.arch-impact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--c-brand);
  opacity: .85;
  transition: width .3s, opacity .3s;
}
.arch-impact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-3);
  border-color: var(--c-brand-glow);
}
.arch-impact-card:hover::before { width: 6px; opacity: 1; }
.arch-impact-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.arch-impact-card__icon {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  background: var(--c-bg);
  border: 1.5px solid var(--c-brand);
  border-radius: 10px;
  color: var(--c-brand);
  flex-shrink: 0;
}
.arch-impact-card__head h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -.01em;
  flex: 1;
}
.arch-impact-card__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--c-brand);
  background: var(--c-brand-soft);
  border: 1px solid var(--c-brand-soft-border);
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: .1em;
}
.arch-impact-card__compare {
  display: grid;
  grid-template-columns: 1fr 28px 1fr;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 18px;
}
.arch-impact-card__before, .arch-impact-card__after {
  padding: 14px 16px;
  border-radius: var(--r-md);
}
.arch-impact-card__before { background: var(--c-bg-tint); border: 1px solid var(--c-line); }
.arch-impact-card__after {
  background: var(--c-bg);
  border: 1.5px solid var(--c-brand);
}
.arch-impact-card__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--c-text-3);
  letter-spacing: .12em;
  margin-bottom: 8px;
  padding: 2px 8px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: 4px;
}
.arch-impact-card__label--ok {
  color: #fff;
  background: var(--c-brand);
  border-color: var(--c-brand);
}
.arch-impact-card__compare p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-text-2);
}
.arch-impact-card__compare p strong {
  color: var(--c-text);
  font-weight: 700;
  background: linear-gradient(transparent 60%, var(--c-brand-soft-2) 60%);
  padding: 0 2px;
}
.arch-impact-card__after p strong {
  background: linear-gradient(transparent 60%, var(--c-brand-soft-3) 60%);
  color: var(--c-brand-2);
}
.arch-impact-card__arrow { display: grid; place-items: center; color: var(--c-brand); }
.arch-impact-card__arrow svg { width: 18px; height: 18px; }
.arch-impact-card__metric {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid rgba(var(--c-brand-rgb), .10);
  color: var(--c-text-2);
  border-radius: var(--r-md);
  margin: 0 -4px;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.arch-impact-card__metric:hover {
  border-color: rgba(var(--c-brand-rgb), .22);
  background: var(--c-brand-soft-2);
}
.arch-impact-card__metric strong {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-brand);
  background: var(--c-brand-soft-2);
  padding: 2px 10px;
  border-radius: 6px;
}
.arch-impact-card__metric:hover strong {
  background: var(--c-brand-soft-3);
}
.arch-impact-card__metric span {
  font-size: 13px;
  color: var(--c-text-2);
  font-weight: 500;
}

.arch-impact-sum {
  margin-top: 12px;
  padding: 32px 36px;
  background: var(--g-brand);
  border-radius: var(--r-xl);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(var(--c-brand-rgb), .25);
}
.arch-impact-sum::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, .06) 0%, transparent 60%);
  pointer-events: none;
}
.arch-impact-sum__title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -.01em;
  position: relative;
}
.arch-impact-sum__title::before {
  content: '∑';
  display: inline-grid;
  place-items: center;
  width: 28px; height: 28px;
  background: rgba(255, 255, 255, .12);
  border-radius: 8px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: rgba(255, 255, 255, .9);
  vertical-align: -6px;
}
.arch-impact-sum__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}
.arch-impact-sum__item {
  padding: 18px 20px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.arch-impact-sum__item strong {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.01em;
}
.arch-impact-sum__item span {
  font-size: 12.5px;
  color: rgba(255, 255, 255, .65);
  line-height: 1.5;
}

/* ============================================================
   8 条数据流卡片 + 5 条设计思路 (旧 CSS 补回)
   ============================================================ */
.arch-flows-section {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.arch-flow-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.arch-flow-card {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  cursor: default;
}
.arch-flow-card:hover, .arch-flow-card.is-hot {
  transform: translateY(-2px);
  box-shadow: var(--sh-2);
  border-color: var(--c-brand);
}
.arch-flow-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.arch-flow-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-brand);
  background: var(--c-brand-soft);
  padding: 3px 8px;
  border-radius: 6px;
}
.arch-flow-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
}
.arch-flow-card p {
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 8px;
}
.arch-flow-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-3);
  background: var(--c-bg-tint);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
}

.arch-philosophy {
  padding: var(--sec-pad-desktop);
  background: var(--c-bg);
}
.arch-philosophy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.arch-philo-card {
  position: relative;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.arch-philo-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-2);
  border-color: var(--c-line-strong);
}
.arch-philo-card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brand);
  margin-bottom: 12px;
}
.arch-philo-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.arch-philo-card p {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.75;
}

@media (max-width: 1024px) {
  .arch-impact-grid { grid-template-columns: 1fr; }
  .arch-impact-sum__grid { grid-template-columns: repeat(2, 1fr); }
  .arch-flow-list { grid-template-columns: 1fr; }
  .arch-philosophy-grid { grid-template-columns: 1fr; }
  .arch-canvas { grid-template-columns: 1fr 50px 1fr 50px 1fr; padding: 24px 16px; }
}
@media (max-width: 720px) {
  .arch-impact { padding: 60px 0; }
  .arch-impact-card__compare {
    grid-template-columns: 1fr;
    grid-template-rows: auto 28px auto;
  }
  .arch-impact-card__arrow { transform: rotate(90deg); }
  .arch-impact-sum { padding: 24px 20px; }
  .arch-impact-sum__grid { grid-template-columns: 1fr; }
  .arch-canvas {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 10px;
    padding: 20px 14px;
  }
  .arch-canvas > * { grid-area: auto !important; }
  .arch-flow { transform: rotate(90deg); padding: 4px 0; }
  .arch-flows-section, .arch-philosophy, .arch-diagram-section { padding: var(--sec-pad-mobile); }
  .arch-center { margin-top: 4px; }
  .arch-center__core { padding: 14px 24px; gap: 14px; }
  .arch-center__icon { width: 40px; height: 40px; }
  .arch-center__label { font-size: 16px; }
}