/* ===================================================================
   WeiClaw 2.0 · 官方站 (晨曦 Dawn Edition · Light)
   -------------------------------------------------------------------
   气质: 高级 · 艺术 · 优雅 · 简洁 · 大气
   配色: 暖白 #FAF8F4 + 落日橘 #E8743C + 沙金 #C9A961
   字体: Fraunces (serif) · Inter (sans) · Noto Serif SC
   =================================================================== */

:root {
  /* ---- 色板:晨曦 Dawn ---- */
  --c-paper:      #FAF8F4;  /* 暖白底 */
  --c-paper-2:    #F4F0E8;  /* 次底 */
  --c-paper-3:    #ECE5D8;  /* 三级底 */
  --c-paper-warm: #FFFAF4;  /* 暖白卡片 */

  --c-ink:        #1A1814;  /* 主文字 */
  --c-ink-2:      #5C564B;  /* 次文字 */
  --c-ink-3:      #98917F;  /* 弱化文字 */
  --c-ink-4:      #C8C0B0;  /* 占位文字 */

  --c-line:       #E5DECF;  /* 描边 */
  --c-line-soft:  #F0EADC;  /* 软描边 */

  --c-sun:        #E8743C;  /* 落日橘 · 主品牌色 */
  --c-sun-soft:   #FBE6D8;
  --c-sun-deep:   #C45A24;

  --c-gold:       #C9A961;  /* 沙金 */
  --c-gold-soft:  #F4EBD6;

  --c-sky:        #2C4A6B;  /* 深海蓝 */
  --c-sky-soft:   #DCE5EF;

  --c-leaf:       #6B8E5A;
  --c-rose:       #C46B6B;

  /* ---- 字体 ---- */
  --f-serif: "Fraunces", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --f-sans:  "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --f-mono:  "JetBrains Mono", ui-monospace, monospace;

  /* ---- 圆角 ---- */
  --r-1: 8px;
  --r-2: 14px;
  --r-3: 22px;
  --r-4: 32px;

  /* ---- 阴影 ---- */
  --sh-1: 0 1px 2px rgba(40,30,15,.04), 0 1px 1px rgba(40,30,15,.03);
  --sh-2: 0 4px 16px rgba(40,30,15,.06), 0 1px 2px rgba(40,30,15,.04);
  --sh-3: 0 12px 32px rgba(40,30,15,.10), 0 2px 6px rgba(40,30,15,.05);
  --sh-4: 0 32px 64px rgba(40,30,15,.14), 0 6px 16px rgba(40,30,15,.06);
  --sh-sun: 0 12px 32px rgba(232,116,60,.22);
  --sh-sun-lg: 0 24px 60px rgba(232,116,60,.28);

  /* ---- 节奏 ---- */
  --gutter: 56px;
  --container: 1280px;

  /* ---- 动画 ---- */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (max-width: 768px) {
  :root { --gutter: 22px; }
}

/* ===================================================================
   RESET
   =================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-paper);
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  font-feature-settings: "kern", "liga", "calt";
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  transition: color .3s var(--ease), opacity .3s var(--ease);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

ol, ul { list-style: none; }

em, i { font-style: italic; }

::selection {
  background: var(--c-sun);
  color: #fff;
}

/* ===================================================================
   全屏噪点纸张质感
   =================================================================== */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='5'/><feColorMatrix values='0 0 0 0 0.5  0 0 0 0 0.4  0 0 0 0 0.25  0 0 0 0.08 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* 鼠标光斑(桌面端) */
.cursor-glow {
  position: fixed;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  background: radial-gradient(circle at center, rgba(232,116,60,.10) 0%, rgba(232,116,60,0) 70%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity .6s var(--ease);
  will-change: transform, opacity;
}
@media (hover: hover) and (pointer: fine) {
  .cursor-glow.active { opacity: 1; }
}

/* ===================================================================
   入场动画 (Reveal) —— 默认完全可见,渐进增强
   --------------------------------------------------------------------
   设计原则:内容必须可见。动画是锦上添花,不能阻塞内容呈现。
   - 无 JS / JS 失败:默认完全可见
   - JS 工作:首屏 reveal 立即显示;非首屏 reveal 滚动到视口才淡入
   =================================================================== */
.reveal {
  opacity: 1;
  transform: none;
}

/* JS 启用动画(由 <head> 内联脚本最早声明,避免 FOUC) */
html.js-on .reveal:not(.in):not(.reveal-immediate) {
  opacity: 0;
  transform: translate3d(0, 28px, 0);
  transition: opacity .85s var(--ease-out), transform .85s var(--ease-out);
}
html.js-on .reveal.in,
html.js-on .reveal.reveal-immediate {
  opacity: 1;
  transform: none;
}

/* 渐进增强失效兜底:页面加载 3 秒后强制全部可见 */
html.reveal-timeout .reveal {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}

/* 无障碍 */
@media (prefers-reduced-motion: reduce) {
  html.js-on .reveal:not(.in):not(.reveal-immediate) {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===================================================================
   通用排版
   =================================================================== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.serif { font-family: var(--f-serif); font-style: italic; font-weight: 500; }
.sun-grad {
  background: linear-gradient(135deg, var(--c-sun) 0%, var(--c-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section {
  padding: 140px 0;
  position: relative;
}
@media (max-width: 1024px) { .section { padding: 96px 0; } }
@media (max-width: 640px)  { .section { padding: 72px 0; } }

.sec-head {
  max-width: 760px;
  margin-bottom: 88px;
}
.sec-label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-ink-3);
  text-transform: uppercase;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sec-label em {
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--c-sun);
  font-size: 13px;
}
.sec-title {
  font-family: var(--f-sans);
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--c-ink);
  margin-bottom: 28px;
}
.sec-title em {
  font-style: italic;
  font-weight: 500;
}
.sec-sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--c-ink-2);
  max-width: 580px;
}

/* ===================================================================
   NAV
   =================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(250, 248, 244, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color .35s var(--ease), background .35s var(--ease);
}
.nav.scrolled {
  border-bottom-color: var(--c-line-soft);
  background: rgba(250, 248, 244, 0.92);
}

.nav-in {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 32px;
  height: 32px;
  display: block;
  filter: drop-shadow(0 6px 14px rgba(232,116,60,.32));
}
.brand-mark svg { display: block; width: 100%; height: 100%; }
.brand-text {
  font-family: var(--f-serif);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}
.brand-text em {
  font-style: italic;
  font-weight: 500;
  color: var(--c-sun);
}
.brand-ver {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--c-ink-3);
  padding: 3px 7px;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 14.5px;
  font-weight: 400;
  color: var(--c-ink-2);
}
.nav-links a {
  position: relative;
}
.nav-links a:hover { color: var(--c-sun); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--c-sun);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav-links a:hover::after { transform: scaleX(1); }

@media (max-width: 900px) {
  .nav-links { display: none; }
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px 10px 20px;
  background: var(--c-ink);
  color: var(--c-paper);
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .005em;
  transition: transform .35s var(--ease), background .35s var(--ease), box-shadow .35s var(--ease);
}
.nav-cta:hover {
  background: var(--c-sun);
  transform: translateY(-1px);
  box-shadow: var(--sh-sun);
}
.nav-cta-arrow {
  display: inline-block;
  font-size: 14px;
  transition: transform .35s var(--ease);
}
.nav-cta:hover .nav-cta-arrow { transform: translateY(2px); }

/* ===================================================================
   HERO
   =================================================================== */
.hero {
  position: relative;
  min-height: calc(100vh - 70px);
  padding: 80px 0 140px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .55;
  will-change: transform;
  animation: float-slow 22s ease-in-out infinite alternate;
}
.blob-1 {
  width: 720px; height: 720px;
  left: -200px; top: -200px;
  background: radial-gradient(circle, rgba(232,116,60,0.55), transparent 70%);
}
.blob-2 {
  width: 600px; height: 600px;
  right: -160px; top: 80px;
  background: radial-gradient(circle, rgba(201,169,97,0.45), transparent 70%);
  animation-delay: -8s;
}
.blob-3 {
  width: 500px; height: 500px;
  left: 30%; bottom: -140px;
  background: radial-gradient(circle, rgba(44,74,107,0.18), transparent 70%);
  animation-delay: -14s;
}
@keyframes float-slow {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -60px) scale(1.08); }
}

.hero-rule {
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line) 50%, transparent);
}

.hero-in {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 72px;
  align-items: center;
}
.hero-text {
  container-type: inline-size;
  min-width: 0;
}

@media (max-width: 1024px) {
  .hero-in { grid-template-columns: 1fr; gap: 64px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-ink-2);
  text-transform: uppercase;
  margin-bottom: 36px;
  padding: 7px 16px 7px 12px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line-soft);
  border-radius: 999px;
  box-shadow: var(--sh-1);
}
.eyebrow-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--c-sun);
  box-shadow: 0 0 0 4px rgba(232,116,60,.18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(232,116,60,.4); }
  50%      { box-shadow: 0 0 0 8px rgba(232,116,60,0); }
}
.eyebrow-sep { color: var(--c-ink-4); }
.eyebrow-meta { color: var(--c-ink-3); font-weight: 500; }

.display {
  font-family: var(--f-sans);
  font-size: clamp(34px, 16cqi, 100px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 38px;
  text-wrap: balance;
}
.d-line {
  display: block;
  text-wrap: nowrap;
}
.display em {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 500;
}
.d-line:first-child {
  font-weight: 400;
}

.lede {
  font-size: 19px;
  line-height: 1.65;
  color: var(--c-ink-2);
  max-width: 540px;
  margin-bottom: 48px;
}
.lede b {
  color: var(--c-ink);
  font-weight: 500;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  padding-top: 36px;
  border-top: 1px solid var(--c-line);
  max-width: 600px;
}
.hm-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hm-item b {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 22px;
  color: var(--c-ink);
  letter-spacing: -0.01em;
}
.hm-item span {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-ink-3);
  text-transform: uppercase;
}

@media (max-width: 640px) {
  .hero-meta { grid-template-columns: repeat(2, 1fr); gap: 22px; }
}

/* ===== HERO 右侧:浮动卡片堆 ===== */
.hero-art {
  position: relative;
  height: 620px;
  perspective: 1400px;
}

@media (max-width: 1024px) {
  .hero-art { height: 480px; }
}
@media (max-width: 640px)  {
  .hero-art { height: 380px; }
}

.orbit {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.orbit-ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1px dashed var(--c-line);
  transform: translate(-50%, -50%);
  opacity: .6;
}
.orbit-ring.r1 { width: 420px; height: 420px; animation: orbit-rot 36s linear infinite; }
.orbit-ring.r2 { width: 560px; height: 560px; border-color: var(--c-line-soft); animation: orbit-rot 60s linear infinite reverse; }
.orbit-ring.r3 { width: 700px; height: 700px; border-color: var(--c-line-soft); animation: orbit-rot 90s linear infinite; }
@keyframes orbit-rot {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.card-stack {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-card {
  position: absolute;
  width: 78%;
  max-width: 540px;
  transition: transform .8s var(--ease-out);
  will-change: transform;
}

.fc-back {
  top: 4%;
  left: 8%;
  transform: rotate(-6deg) translateZ(-40px);
  width: 64%;
  opacity: .9;
  z-index: 1;
}
.fc-mid {
  top: 16%;
  right: 4%;
  transform: rotate(4deg);
  width: 68%;
  z-index: 2;
}
.fc-front {
  bottom: 0%;
  left: 16%;
  transform: rotate(-2deg);
  width: 76%;
  z-index: 3;
}

.fc-frame {
  border-radius: var(--r-3);
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  box-shadow: var(--sh-4);
  overflow: hidden;
  transition: transform .5s var(--ease);
}
.floating-card:hover .fc-frame {
  transform: translateY(-6px) scale(1.015);
}
.fc-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--c-paper-2);
  border-bottom: 1px solid var(--c-line-soft);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--c-ink-3);
}
.fc-bar .d {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--c-ink-4);
  opacity: .5;
}
.fc-bar .d1 { background: #E8A4A4; opacity: .8; }
.fc-bar .d2 { background: #E8C97B; opacity: .8; }
.fc-bar .d3 { background: #A7C794; opacity: .8; }
.fc-bar em {
  margin-left: 10px;
  font-style: italic;
  color: var(--c-ink-2);
}

.fc-frame img {
  width: 100%;
  display: block;
  background: #fff;
}

/* 浮动气泡 */
.bubble {
  position: absolute;
  padding: 9px 16px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink);
  box-shadow: var(--sh-3);
  z-index: 5;
  animation: bubble-float 5s ease-in-out infinite;
}
.bubble-1 {
  top: -8px;
  right: 12%;
  color: var(--c-sun);
  animation-delay: 0s;
}
.bubble-2 {
  bottom: 22%;
  left: -10px;
  animation-delay: -1.6s;
}
.bubble-3 {
  bottom: -4px;
  right: -6px;
  background: var(--c-sun);
  color: #fff;
  border-color: var(--c-sun);
  animation-delay: -3.2s;
  box-shadow: var(--sh-sun);
}
@keyframes bubble-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

/* ===== 滚动提示 ===== */
.scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .25em;
  color: var(--c-ink-3);
  z-index: 2;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--c-ink-3), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: "";
  position: absolute;
  top: -20px;
  left: 0;
  width: 100%;
  height: 20px;
  background: var(--c-sun);
  animation: scroll-down 2.2s ease-in-out infinite;
}
@keyframes scroll-down {
  to { transform: translateY(70px); }
}

/* ===================================================================
   按钮系统
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 28px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .005em;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform .4s var(--ease), background .4s var(--ease),
              color .4s var(--ease), box-shadow .4s var(--ease),
              border-color .4s var(--ease);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  will-change: transform;
}
.btn-label { position: relative; z-index: 1; }
.btn-icon, .btn-arrow {
  position: relative;
  z-index: 1;
  display: inline-flex;
  transition: transform .4s var(--ease);
}

.btn-primary {
  background: var(--c-ink);
  color: var(--c-paper);
  box-shadow: 0 12px 28px rgba(26,24,20,.18);
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-sun) 0%, var(--c-gold) 100%);
  opacity: 0;
  transition: opacity .4s var(--ease);
  z-index: 0;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-sun-lg);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover .btn-icon { transform: translateY(3px); }

.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-line);
}
.btn-ghost:hover {
  background: var(--c-paper-warm);
  border-color: var(--c-sun);
  color: var(--c-sun);
}
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }

.btn-lg {
  padding: 22px 36px;
  font-size: 16px;
}

/* ===================================================================
   SECTION · FEATURE (核心三件事)
   =================================================================== */
.feature {
  background: var(--c-paper);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 1024px) { .feature-grid { grid-template-columns: 1fr; } }

.ft-card {
  position: relative;
  padding: 56px 40px 44px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: var(--r-4);
  transition: transform .6s var(--ease), border-color .6s var(--ease),
              box-shadow .6s var(--ease);
  overflow: hidden;
}
.ft-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 200px;
  background: radial-gradient(circle at 80% 0%, var(--c-gold-soft) 0%, transparent 70%);
  opacity: 0;
  transition: opacity .6s var(--ease);
}
.ft-card:hover {
  transform: translateY(-8px);
  border-color: var(--c-sun);
  box-shadow: var(--sh-3);
}
.ft-card:hover::before { opacity: 1; }

.ft-card.primary {
  background: linear-gradient(135deg, #FFFAF4 0%, #F8E8D8 100%);
  border-color: var(--c-sun-soft);
}
.ft-card.primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-4);
  padding: 1px;
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.ft-num {
  position: absolute;
  top: 28px;
  right: 36px;
  font-family: var(--f-serif);
  font-size: 64px;
  line-height: 1;
  font-weight: 300;
  color: var(--c-sun);
  opacity: .15;
  letter-spacing: -0.04em;
}
.ft-num em { font-style: italic; }

.ft-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--r-2);
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  color: var(--c-sun);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.ft-card.primary .ft-icon {
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  border-color: transparent;
  color: #fff;
  box-shadow: var(--sh-sun);
}

.ft-card h3 {
  font-family: var(--f-sans);
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}
.ft-card h3 em {
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--c-sun);
}

.ft-card p {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--c-ink-2);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.ft-pts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
  padding-top: 24px;
  border-top: 1px solid var(--c-line-soft);
}
.ft-pts li {
  font-size: 13.5px;
  color: var(--c-ink-2);
  display: flex;
  align-items: center;
  gap: 10px;
}
.ft-pts li::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--c-sun);
}

/* ===================================================================
   SECTION · FIELD (协作现场)
   =================================================================== */
.field {
  background: linear-gradient(180deg, var(--c-paper) 0%, var(--c-paper-2) 100%);
}

.field-shot {
  position: relative;
  margin: 56px 0 96px;
}
.shot-shell {
  position: relative;
  border-radius: var(--r-4);
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  box-shadow: var(--sh-4);
  overflow: hidden;
  max-width: 1100px;
  margin: 0 auto;
}
.shot-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 22px;
  background: var(--c-paper-2);
  border-bottom: 1px solid var(--c-line-soft);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-ink-3);
}
.shot-bar .d {
  width: 11px; height: 11px;
  border-radius: 50%;
}
.shot-bar .d1 { background: #E8A4A4; }
.shot-bar .d2 { background: #E8C97B; }
.shot-bar .d3 { background: #A7C794; }
.shot-bar em {
  margin-left: 10px;
  font-style: italic;
  color: var(--c-ink-2);
}
.shot-bar-meta {
  margin-left: auto;
  font-style: italic;
  color: var(--c-sun);
}
.shot-bar-meta::before {
  content: "●";
  margin-right: 6px;
  animation: pulse-dot 1.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: .5; }
  50%      { opacity: 1; }
}
.shot-shell img {
  width: 100%;
  display: block;
}

/* 浮动标注 */
.anno {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 4;
}
.anno-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-sun);
  box-shadow: 0 0 0 6px rgba(232,116,60,.18), 0 4px 12px rgba(232,116,60,.4);
  animation: pulse 2.4s ease-in-out infinite;
  flex-shrink: 0;
}
.anno-label {
  padding: 7px 14px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--c-ink);
  box-shadow: var(--sh-2);
  white-space: nowrap;
}
.anno-1 { top: 14%; left: -10px; }
.anno-2 { top: 42%; right: -16px; }
.anno-3 { bottom: 20%; left: 18%; }

@media (max-width: 768px) {
  .anno { display: none; }
}

.field-quote {
  text-align: center;
  position: relative;
  padding: 64px 0 24px;
  max-width: 720px;
  margin: 0 auto;
}
.fq-mark {
  display: block;
  font-family: var(--f-serif);
  font-size: 100px;
  line-height: 1;
  color: var(--c-sun);
  opacity: .25;
  margin-bottom: 0;
}
.field-quote p {
  font-family: var(--f-serif);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.4;
  font-weight: 400;
  color: var(--c-ink);
  letter-spacing: -0.01em;
}
.field-quote em {
  font-style: italic;
  font-weight: 500;
}

/* ===================================================================
   SECTION · TEAM (AI 八位员工)
   =================================================================== */
.team {
  background: var(--c-paper);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .team-grid { grid-template-columns: 1fr; } }

.tm-card {
  padding: 32px 26px 30px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  transition: transform .5s var(--ease), border-color .5s var(--ease),
              box-shadow .5s var(--ease);
  position: relative;
  overflow: hidden;
}
.tm-card::before {
  content: "";
  position: absolute;
  top: -1px; right: -1px;
  width: 60%;
  height: 60%;
  background: var(--av, linear-gradient(135deg, var(--c-sun-soft), transparent));
  opacity: 0;
  border-radius: 50% 0 0 50%;
  filter: blur(40px);
  transition: opacity .5s var(--ease);
  pointer-events: none;
}
.tm-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-sun);
  box-shadow: var(--sh-3);
}
.tm-card:hover::before { opacity: .5; }

.tm-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.tm-av {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--av, linear-gradient(135deg, #F4D2B0, #E89F65));
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 500;
  color: #fff;
  box-shadow: 0 6px 14px rgba(40,30,15,.12);
}
.tm-no {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-ink-3);
}
.tm-card h4 {
  font-size: 19px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.tm-job {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--c-sun);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.tm-skill {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-ink-2);
}

/* 团队底部 · 员工市场 */
.team-bottom {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}
.tb-line {
  width: 80px;
  height: 1px;
  background: var(--c-line);
}
.tb-card {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 20px 32px 20px 24px;
  background: linear-gradient(135deg, #FFFAF4 0%, #F8E8D8 100%);
  border: 1px solid var(--c-sun-soft);
  border-radius: 999px;
  box-shadow: var(--sh-2);
  max-width: 100%;
}
.tb-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: var(--sh-sun);
}
.tb-text h4 {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 3px;
}
.tb-text p {
  font-size: 13px;
  color: var(--c-ink-2);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .tb-card { flex-direction: column; text-align: center; border-radius: var(--r-3); padding: 24px; }
}

/* ===================================================================
   SECTION · TECH (双层架构)
   =================================================================== */
.tech {
  background: linear-gradient(180deg, var(--c-paper) 0%, var(--c-paper-2) 50%, var(--c-paper) 100%);
  position: relative;
  overflow: hidden;
}
.tech::before {
  content: "";
  position: absolute;
  top: 30%; right: -20%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(201,169,97,.12), transparent 60%);
  pointer-events: none;
}

.tech-chart {
  max-width: 1000px;
  margin: 0 auto 72px;
  padding: 56px 40px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: var(--r-4);
  box-shadow: var(--sh-2);
  position: relative;
}

.tc-row {
  display: flex;
  justify-content: center;
  align-items: center;
}
.tc-row.tc-exp {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}
.tc-row.tc-pm {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 720px;
  margin: 0 auto;
}
@media (max-width: 540px) {
  .tc-row.tc-pm { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .tc-row.tc-exp { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

.tc-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  transition: transform .4s var(--ease), border-color .4s var(--ease);
}
.tc-node:hover {
  transform: translateY(-2px);
  border-color: var(--c-sun);
}

.node-you {
  background: var(--c-paper);
}
.tc-node-tag {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-ink-3);
  padding: 4px 9px;
  background: var(--c-paper-2);
  border-radius: 6px;
  text-transform: uppercase;
}
.tc-node-name {
  font-size: 14px;
  color: var(--c-ink);
  font-style: italic;
  font-family: var(--f-serif);
}
.tc-node-desc {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--c-ink-3);
  margin-left: 6px;
  text-transform: uppercase;
}

.node-pm {
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  border-color: transparent;
  color: #fff;
  box-shadow: var(--sh-sun);
}
.node-pm .tc-node-tag {
  background: rgba(255,255,255,.22);
  color: #fff;
}
.node-pm .tc-node-name { color: #fff; }
.node-pm .tc-node-desc { color: rgba(255,255,255,.85); }

.node-exp {
  flex-direction: column;
  gap: 8px;
  padding: 20px 12px;
  text-align: center;
  font-size: 13px;
  color: var(--c-ink);
}
.tc-mini {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-paper-2), var(--c-sun-soft));
  color: var(--c-sun-deep);
  font-family: var(--f-serif);
  font-size: 15px;
  font-weight: 500;
}

.tc-link {
  display: block;
  height: 60px;
  color: var(--c-ink-3);
  margin: 12px auto;
  max-width: 200px;
}
.tc-link-fan {
  max-width: 100%;
  height: 80px;
  margin: 14px 0;
}

.tech-bullets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 1000px;
  margin: 0 auto;
}
@media (max-width: 900px)  { .tech-bullets { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .tech-bullets { grid-template-columns: 1fr; } }

.tb-item {
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
}
.tb-item .tb-no {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-sun);
  display: block;
  margin-bottom: 14px;
}
.tb-item h4 {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 8px;
}
.tb-item p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-ink-2);
}

/* ===================================================================
   SECTION · GALLERY (横向画廊)
   =================================================================== */
.gallery {
  background: var(--c-paper);
  padding-bottom: 96px;
  overflow: hidden;
}

.gallery-rail {
  margin-top: 56px;
  position: relative;
}
.gr-track {
  display: flex;
  gap: 28px;
  padding: 24px var(--gutter) 40px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}
.gr-track::-webkit-scrollbar { display: none; }

.gr-card {
  flex: 0 0 580px;
  scroll-snap-align: center;
  transition: transform .5s var(--ease);
}
.gr-card:hover {
  transform: translateY(-6px);
}
@media (max-width: 768px) {
  .gr-card { flex-basis: 86vw; }
}

.grc-frame {
  border-radius: var(--r-3);
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  box-shadow: var(--sh-3);
  overflow: hidden;
  margin-bottom: 18px;
  aspect-ratio: 16/10;
}
.grc-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.2s var(--ease);
}
.gr-card:hover .grc-frame img {
  transform: scale(1.04);
}

.gr-card figcaption {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-left: 4px;
}
.gr-card figcaption b {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
}
.gr-card figcaption span {
  font-size: 13px;
  color: var(--c-ink-3);
}

.gr-controls {
  max-width: var(--container);
  margin: 8px auto 0;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 18px;
}
.gr-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  color: var(--c-ink);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .35s var(--ease);
  box-shadow: var(--sh-1);
}
.gr-btn:hover {
  background: var(--c-sun);
  color: #fff;
  border-color: var(--c-sun);
  box-shadow: var(--sh-sun);
  transform: translateY(-2px);
}
.gr-progress {
  flex: 1;
  height: 2px;
  background: var(--c-line);
  border-radius: 99px;
  overflow: hidden;
}
.gr-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-sun), var(--c-gold));
  border-radius: 99px;
  transition: width .3s var(--ease);
}

/* ===================================================================
   SECTION · WORKFLOW
   =================================================================== */
.workflow {
  background: var(--c-paper-2);
  position: relative;
  overflow: hidden;
}
.workflow::before {
  content: "";
  position: absolute;
  top: 10%; left: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(232,116,60,.10), transparent 60%);
  pointer-events: none;
}

.flow-line {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 800px;
  margin: 0 auto;
}
.flow-line::before {
  content: "";
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 36px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--c-line) 10%, var(--c-line) 90%, transparent);
}

.flow-step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 24px 0;
  position: relative;
  z-index: 1;
}

.fs-no {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--c-ink-2);
  flex-shrink: 0;
  box-shadow: var(--sh-1);
  transition: all .5s var(--ease);
}
.flow-step:hover .fs-no {
  background: linear-gradient(135deg, var(--c-sun-soft), var(--c-gold-soft));
  color: var(--c-sun-deep);
  border-color: var(--c-sun);
  transform: scale(1.08);
}

.fs-content {
  padding-top: 10px;
  flex: 1;
}
.fs-content h4 {
  font-size: 21px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.fs-content p {
  font-size: 15px;
  color: var(--c-ink-2);
  line-height: 1.6;
}
.fs-quote {
  display: inline-block;
  font-family: var(--f-serif);
  font-size: 17px;
  font-style: italic;
  color: var(--c-ink);
  padding: 6px 16px;
  background: var(--c-paper-warm);
  border-left: 2px solid var(--c-sun);
  border-radius: 0 var(--r-1) var(--r-1) 0;
}

.flow-done .fs-no {
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  color: #fff;
  border-color: transparent;
  box-shadow: var(--sh-sun);
}
.flow-done .fs-no.fs-done {
  font-size: 26px;
}
.flow-done .fs-content h4 {
  color: var(--c-sun);
}

/* ===================================================================
   SECTION · SCENES
   =================================================================== */
.scenes {
  background: var(--c-paper);
}

.scenes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  overflow: hidden;
}
@media (max-width: 900px)  { .scenes-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .scenes-grid { grid-template-columns: 1fr; } }

.sc-item {
  background: var(--c-paper-warm);
  padding: 44px 36px;
  transition: background .4s var(--ease);
  position: relative;
}
.sc-item:hover {
  background: linear-gradient(135deg, #FFFAF4, #F8E8D8);
}
.sc-item b {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-sun);
  display: block;
  margin-bottom: 16px;
}
.sc-item h5 {
  font-size: 20px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.sc-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-ink-2);
}

/* ===================================================================
   SECTION · DOWNLOAD (收束)
   =================================================================== */
.download {
  background: var(--c-paper);
  padding: 100px 0 160px;
}

.dl-wrap {
  position: relative;
  padding: 80px 60px;
  background: linear-gradient(135deg, #1A1814 0%, #2C261F 100%);
  border-radius: var(--r-4);
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
  box-shadow: var(--sh-4);
}
@media (max-width: 1024px) {
  .dl-wrap { grid-template-columns: 1fr; gap: 56px; padding: 56px 36px; }
}
@media (max-width: 540px)  {
  .dl-wrap { padding: 44px 26px; }
}

.dl-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: var(--r-4);
}
.dl-blob {
  position: absolute;
  width: 700px;
  height: 700px;
  right: -250px;
  bottom: -350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232,116,60,.45), transparent 60%);
  filter: blur(60px);
  animation: float-slow 18s ease-in-out infinite alternate;
}

.dl-left { position: relative; z-index: 2; }
.dl-left .sec-label { color: rgba(244,235,214,.65); }
.dl-left .sec-label em { color: var(--c-sun); }
.dl-title {
  font-family: var(--f-sans);
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--c-paper);
  margin-bottom: 24px;
}
.dl-title em {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 500;
}
.dl-lede {
  font-size: 17px;
  color: rgba(244,235,214,.78);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 460px;
}
.dl-cta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}
.dl-tip {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(244,235,214,.5);
}

.dl-wrap .btn-primary {
  background: linear-gradient(135deg, var(--c-sun) 0%, var(--c-gold) 100%);
  color: #fff;
  box-shadow: var(--sh-sun-lg);
}
.dl-wrap .btn-primary::before { display: none; }
.dl-wrap .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 32px 80px rgba(232,116,60,.45);
}

.dl-specs {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 36px;
}
.dl-specs li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(244,235,214,.1);
}
.dl-specs li span {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(244,235,214,.55);
  text-transform: uppercase;
}
.dl-specs li b {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 17px;
  color: var(--c-paper);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.foot {
  background: var(--c-paper-2);
  padding: 72px 0 32px;
  border-top: 1px solid var(--c-line);
}

.foot-in {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--c-line);
}
@media (max-width: 900px) {
  .foot-in { grid-template-columns: 1fr; gap: 48px; }
}

.foot-brand .brand { margin-bottom: 18px; }
.foot-brand p {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 16px;
  color: var(--c-ink-2);
  max-width: 320px;
}

.foot-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}
@media (max-width: 540px) {
  .foot-links { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

.fl-col h6 {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-ink-3);
  text-transform: uppercase;
  margin-bottom: 18px;
  font-weight: 500;
}
.fl-col a {
  display: block;
  font-size: 14px;
  color: var(--c-ink);
  padding: 5px 0;
  transition: color .3s var(--ease);
}
.fl-col a:hover { color: var(--c-sun); }

/* 联系栏(公司 / 微信 / 二维码) */
.fl-contact { display: flex; flex-direction: column; gap: 6px; }
.fl-contact .fl-company {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 18px;
  font-weight: 500;
  color: var(--c-ink);
  margin: 2px 0 6px;
}
.fl-wechat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 10px;
}
.fl-wechat-label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-ink-3);
  text-transform: uppercase;
}
.fl-wechat-id {
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--c-ink);
  letter-spacing: .01em;
}
.fl-qr {
  margin: 8px 0 0;
  display: flex;
  align-items: center;
  gap: 14px;
}
.fl-qr img {
  width: 92px;
  height: 92px;
  border-radius: 10px;
  border: 1px solid var(--c-line);
  background: #fff;
  padding: 6px;
  object-fit: contain;
  display: block;
  transition: transform .4s var(--ease);
}
.fl-qr:hover img { transform: scale(1.04); }
.fl-qr figcaption {
  font-size: 12px;
  color: var(--c-ink-3);
  letter-spacing: .02em;
  max-width: 96px;
  line-height: 1.5;
}
@media (max-width: 540px) {
  .fl-qr { flex-direction: column; align-items: flex-start; gap: 8px; }
  .fl-qr img { width: 110px; height: 110px; }
}

.foot-bot {
  padding-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12.5px;
  color: var(--c-ink-3);
  flex-wrap: wrap;
}
.foot-rule {
  flex: 1;
  height: 1px;
  background: var(--c-line);
  min-width: 40px;
}
.foot-tag {
  font-family: var(--f-mono);
  letter-spacing: .08em;
}

/* ===================================================================
   SECTION · AGENTS (AI 员工)
   复用 team / team-grid / tm-card / tm-head / tm-av / tm-no / h4 / tm-job / tm-skill / team-bottom
   但需要额外的 .ag-* 命名空间（语义化）
   =================================================================== */
.agents {
  background: var(--c-paper);
}

.agents-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) { .agents-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .agents-grid { grid-template-columns: 1fr; } }

.ag-card {
  padding: 32px 26px 30px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  transition: transform .5s var(--ease), border-color .5s var(--ease),
              box-shadow .5s var(--ease);
  position: relative;
  overflow: hidden;
}
.ag-card::before {
  content: "";
  position: absolute;
  top: -1px; right: -1px;
  width: 60%;
  height: 60%;
  background: var(--av, linear-gradient(135deg, var(--c-sun-soft), transparent));
  opacity: 0;
  border-radius: 50% 0 0 50%;
  filter: blur(40px);
  transition: opacity .5s var(--ease);
  pointer-events: none;
}
.ag-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-sun);
  box-shadow: var(--sh-3);
}
.ag-card:hover::before { opacity: .5; }

.ag-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.ag-av {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--av, linear-gradient(135deg, #F4D2B0, #E89F65));
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 500;
  color: #fff;
  box-shadow: 0 6px 14px rgba(40,30,15,.12);
}
.ag-no {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-ink-3);
}
.ag-card h4 {
  font-size: 19px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.ag-job {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--c-sun);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.ag-skill {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-ink-2);
}

/* 第四张卡 · 自建卡 —— 半透明 + 虚线边框表达「可创建」 */
.ag-card.ag-custom {
  background: repeating-linear-gradient(
    135deg,
    var(--c-paper-warm) 0 12px,
    rgba(232,116,60,0.04) 12px 24px
  );
  border-style: dashed;
  border-color: var(--c-line);
}
.ag-card.ag-custom .ag-av {
  background: linear-gradient(135deg, var(--c-paper-2), var(--c-sun-soft));
  color: var(--c-sun-deep);
  font-size: 22px;
}

.agents-bottom {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}
.ab-line {
  width: 80px;
  height: 1px;
  background: var(--c-line);
}
.ab-card {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 20px 32px 20px 24px;
  background: linear-gradient(135deg, #FFFAF4 0%, #F8E8D8 100%);
  border: 1px solid var(--c-sun-soft);
  border-radius: 999px;
  box-shadow: var(--sh-2);
  max-width: 100%;
}
.ab-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: var(--sh-sun);
}
.ab-text h4 {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 3px;
}
.ab-text p {
  font-size: 13px;
  color: var(--c-ink-2);
  line-height: 1.5;
}
@media (max-width: 640px) {
  .ab-card { flex-direction: column; text-align: center; border-radius: var(--r-3); padding: 24px; }
}

/* ===================================================================
   SECTION · ENGINEER (AI 工程师)
   =================================================================== */
.engineer {
  background: linear-gradient(180deg, var(--c-paper-2) 0%, var(--c-paper) 100%);
}

.eng-shot {
  position: relative;
  margin: 56px 0 88px;
}
.eng-shot .shot-shell {
  max-width: 1000px;
  margin: 0 auto;
}

.eng-bullets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 1000px;
  margin: 0 auto;
}
@media (max-width: 900px)  { .eng-bullets { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .eng-bullets { grid-template-columns: 1fr; } }

.eb-item {
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
}
.eb-item .eb-no {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-sun);
  display: block;
  margin-bottom: 14px;
}
.eb-item h4 {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 8px;
}
.eb-item p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-ink-2);
}

/* ===================================================================
   SECTION · OPS (运营配置)
   复用 feature / feature-grid / ft-card / ft-num / ft-icon / h3 / p / ft-pts
   但用 .op-* 命名空间以表达"运营"语境
   =================================================================== */
.ops {
  background: var(--c-paper-2);
}

.ops-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 1024px) { .ops-grid { grid-template-columns: 1fr; } }

.op-card {
  position: relative;
  padding: 56px 40px 44px;
  background: var(--c-paper-warm);
  border: 1px solid var(--c-line);
  border-radius: var(--r-4);
  transition: transform .6s var(--ease), border-color .6s var(--ease),
              box-shadow .6s var(--ease);
  overflow: hidden;
}
.op-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 200px;
  background: radial-gradient(circle at 80% 0%, var(--c-gold-soft) 0%, transparent 70%);
  opacity: 0;
  transition: opacity .6s var(--ease);
}
.op-card:hover {
  transform: translateY(-8px);
  border-color: var(--c-sun);
  box-shadow: var(--sh-3);
}
.op-card:hover::before { opacity: 1; }

.op-card.primary {
  background: linear-gradient(135deg, #FFFAF4 0%, #F8E8D8 100%);
  border-color: var(--c-sun-soft);
}
.op-card.primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-4);
  padding: 1px;
  background: linear-gradient(135deg, var(--c-sun), var(--c-gold));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.op-num {
  position: absolute;
  top: 28px;
  right: 36px;
  font-family: var(--f-serif);
  font-size: 64px;
  line-height: 1;
  font-weight: 300;
  color: var(--c-sun);
  opacity: .15;
  letter-spacing: -0.04em;
}
.op-num em { font-style: italic; }

.op-card h3 {
  font-family: var(--f-sans);
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}

.op-card p {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--c-ink-2);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.op-pts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
  padding-top: 24px;
  border-top: 1px solid var(--c-line-soft);
}
.op-pts li {
  font-size: 13.5px;
  color: var(--c-ink-2);
  display: flex;
  align-items: center;
  gap: 10px;
}
.op-pts li::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--c-sun);
}

/* ===================================================================
   响应式细节
   =================================================================== */
@media (max-width: 768px) {
  .display { font-size: clamp(40px, 9vw, 60px); }
  .sec-title { font-size: clamp(30px, 7vw, 44px); }
  .lede { font-size: 16px; }

  .ft-card { padding: 40px 28px 32px; }
  .ft-card h3 { font-size: 23px; }

  .hero-cta { gap: 12px; }
  .hero-cta .btn { padding: 15px 22px; font-size: 14px; }

  .flow-line::before { left: 28px; }
  .fs-no { width: 56px; height: 56px; font-size: 16px; }
  .flow-step { gap: 20px; }

  .tech-chart { padding: 36px 20px; }
  .tc-node { padding: 12px 16px; }

  .field-shot { margin: 36px 0 56px; }
}

/* ===================================================================
   减少动效: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;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}