/* ============================================================
   蚂蚁传媒官网 · ANT MEDIA
   设计语言：品牌蓝 #1676FF × 极简白 × 深藏青
   轻盈科技感，与 Logo / PPT 视觉体系一致
   ============================================================ */

:root {
  --blue: #1676ff;           /* 品牌主色（取自 Logo） */
  --blue-deep: #0b54d9;      /* 主色加深（hover） */
  --blue-light: #5aa0ff;     /* 主色提亮 */
  --blue-ghost: #eaf2ff;     /* 极浅蓝（标签底） */
  --tint: #f2f6ff;           /* 浅蓝分区背景 */
  --navy: #060d1f;           /* 深藏青（深色分区） */
  --navy-2: #0c1a3a;         /* 深色卡片 */
  --navy-line: rgba(255, 255, 255, 0.1);
  --text: #0f1b33;           /* 正文深色 */
  --text-soft: #45557a;
  --muted: #6b7a99;          /* 次要文字 */
  --line: rgba(15, 27, 51, 0.08);
  --white: #ffffff;
  --on-dark: #eef3ff;        /* 深底文字 */
  --on-dark-muted: rgba(238, 243, 255, 0.62);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 18px;
  --shadow-sm: 0 6px 24px rgba(15, 27, 51, 0.06);
  --shadow-lg: 0 30px 60px rgba(22, 118, 255, 0.14);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { display: block; }

.container { width: min(1200px, 92vw); margin: 0 auto; }

/* ---------- 通用元素 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--muted);
  text-transform: uppercase;
}
.eyebrow i {
  width: 34px; height: 2px;
  background: var(--blue);
  display: inline-block;
}
.eyebrow-light { color: var(--on-dark-muted); }
.eyebrow-light i { background: var(--blue-light); }

.section-title {
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin-top: 22px;
  color: var(--text);
}
.section-title em { font-style: normal; color: var(--blue); }
.section-navy .section-title { color: var(--on-dark); }
.section-navy .section-title em { color: var(--blue-light); }

.section-desc {
  margin-top: 18px;
  max-width: 560px;
  font-size: 16px;
  color: var(--muted);
}
.section-navy .section-desc { color: var(--on-dark-muted); }

.section { padding: clamp(80px, 10vw, 130px) 0; position: relative; }
.section-white { background: var(--white); }
.section-tint { background: var(--tint); }
.section-navy { background: var(--navy); color: var(--on-dark); }

.section-head { margin-bottom: clamp(44px, 6vw, 68px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all 0.35s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn .arr { transition: transform 0.4s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }

.btn-solid {
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  color: #fff;
  box-shadow: 0 8px 20px rgba(22, 118, 255, 0.24);
}
.btn-solid:hover { box-shadow: 0 12px 28px rgba(22, 118, 255, 0.34); filter: brightness(1.06); }

.btn-ghost { border-color: rgba(15, 27, 51, 0.18); color: var(--text); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-ghost); }

.btn-dark { background: var(--text); color: #fff; }
.btn-dark:hover { background: var(--blue); box-shadow: 0 10px 24px rgba(22, 118, 255, 0.24); }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.4s var(--ease);
}
.nav.scrolled {
  padding: 8px 0;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }

.brand-logo { height: 34px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  position: relative;
  transition: color 0.3s;
}
.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: var(--blue);
  transition: width 0.4s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  padding: 9px 24px;
  background: var(--blue);
  border-radius: 999px;
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(22, 118, 255, 0.22);
}
.nav-cta:hover { background: var(--blue-deep); box-shadow: 0 6px 18px rgba(22, 118, 255, 0.32); }
.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 42px; height: 42px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
}
.nav-toggle span {
  width: 18px; height: 2px;
  background: var(--text);
  transition: all 0.3s var(--ease);
}
.nav-toggle.open span:first-child { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle.open span:last-child { transform: translateY(-4.5px) rotate(-45deg); }

/* ============================================================
   Hero（浅色科技感）
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: 140px 0 0;
  overflow: hidden;
  background: linear-gradient(180deg, #f7faff 0%, #ffffff 70%);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}
.blob-1 {
  top: -14%; right: -8%;
  width: 46vw; height: 46vw;
  background: radial-gradient(circle, rgba(22, 118, 255, 0.18), transparent 65%);
}
.blob-2 {
  bottom: -20%; left: -12%;
  width: 40vw; height: 40vw;
  background: radial-gradient(circle, rgba(90, 160, 255, 0.14), transparent 65%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(22, 118, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 118, 255, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 60% 20%, #000 25%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 60% 20%, #000 30%, transparent 72%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-weight: 900;
  font-size: clamp(44px, 6.6vw, 84px);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--text);
  margin: 26px 0 26px;
}
.hero-title em {
  font-style: normal;
  color: var(--blue);
  position: relative;
  display: inline-block;
}
.hero-title em::after {
  content: "";
  position: absolute;
  left: 2px; right: 2px; bottom: 6px;
  height: 12px;
  background: linear-gradient(90deg, rgba(22, 118, 255, 0.22), rgba(22, 118, 255, 0.08));
  border-radius: 4px;
  z-index: -1;
}

.hero-sub {
  color: var(--text-soft);
  font-size: clamp(15px, 1.4vw, 17px);
  max-width: 540px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 44px;
}
.hero-pills li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 8px 18px;
  background: var(--blue-ghost);
  border: 1px solid rgba(22, 118, 255, 0.18);
  border-radius: 999px;
  color: var(--blue-deep);
  transition: all 0.4s var(--ease);
}
.hero-pills li:hover { background: var(--blue); border-color: var(--blue); color: #fff; }

/* Hero 视觉区 */
.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 520px;
}

.visual-blob {
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(90, 160, 255, 0.35), rgba(22, 118, 255, 0.1) 55%, transparent 75%);
  filter: blur(4px);
}

.orbit { position: absolute; width: min(520px, 100%); aspect-ratio: 1; }
.ring {
  fill: none;
  stroke: rgba(22, 118, 255, 0.18);
  stroke-width: 1.2;
}
.ring-2 { stroke-dasharray: 3 8; }
.ring-3 { stroke: rgba(22, 118, 255, 0.32); stroke-dasharray: 2 6; }

.orbit-spin { transform-origin: 280px 280px; }
.spin-1 { animation: spin 26s linear infinite; }
.spin-2 { animation: spin 38s linear infinite reverse; }
.spin-3 { animation: spin 20s linear infinite; }
.spin-4 { animation: spin 44s linear infinite; }

.dot { fill: rgba(22, 118, 255, 0.45); }
.dot-accent { fill: var(--blue); }

@keyframes spin { to { transform: rotate(360deg); } }

.hero-icon-card {
  position: relative;
  z-index: 2;
  width: 180px; height: 180px;
  background: #fff;
  border-radius: 42px;
  box-shadow: 0 34px 70px rgba(22, 118, 255, 0.22), 0 4px 14px rgba(15, 27, 51, 0.06);
  display: grid;
  place-items: center;
  animation: float 6s ease-in-out infinite;
}
.hero-icon-card img { width: 118px; height: 118px; }

.float-card {
  position: absolute;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(22, 118, 255, 0.14);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 16px 26px;
  box-shadow: var(--shadow-sm);
  animation: float 8s ease-in-out infinite;
}
.fc-1 { top: 8%; left: 0; animation-delay: -2s; }
.fc-2 { bottom: 10%; right: 0; animation-delay: -4.5s; }
.fc-num {
  font-weight: 900;
  font-size: 30px;
  color: var(--blue);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.fc-label { font-size: 12px; color: var(--muted); letter-spacing: 0.08em; }

.float-tag {
  position: absolute;
  z-index: 3;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--blue-deep);
  background: #fff;
  border: 1px solid rgba(22, 118, 255, 0.2);
  padding: 9px 20px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  animation: float 8s ease-in-out infinite;
}
.ft-1 { top: 22%; right: 2%; animation-delay: -1s; }
.ft-2 { bottom: 26%; left: 2%; animation-delay: -5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Hero 底部数据条 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  margin-top: clamp(50px, 7vh, 80px);
  padding-bottom: 10px;
  position: relative;
  z-index: 2;
}
.hstat {
  padding: 30px 10px 30px;
  text-align: center;
  position: relative;
}
.hstat + .hstat::before {
  content: "";
  position: absolute;
  left: 0; top: 28%;
  height: 44%;
  width: 1px;
  background: var(--line);
}
.hstat b {
  font-weight: 900;
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: 0.01em;
  display: block;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.hstat b::first-letter { color: var(--blue); }
.hstat span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ============================================================
   跑马灯（品牌蓝条带）
   ============================================================ */
.marquee {
  background: linear-gradient(90deg, var(--blue-deep), var(--blue));
  overflow: hidden;
  padding: 15px 0;
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-track span {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.94);
  white-space: nowrap;
}
.m-dot { width: 6px; height: 6px; border-radius: 50%; background: rgba(255, 255, 255, 0.45); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ============================================================
   关于 / 定位
   ============================================================ */
.about-lead {
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 500;
  line-height: 1.95;
  color: var(--text);
  max-width: 920px;
  margin-bottom: clamp(48px, 7vw, 80px);
}
.about-lead strong {
  color: var(--blue);
  font-weight: 800;
  padding: 0 2px;
  background: linear-gradient(transparent 68%, rgba(22, 118, 255, 0.16) 68%);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pillar-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 34px 42px;
  position: relative;
  overflow: hidden;
  transition: all 0.45s var(--ease);
}
.pillar-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.pillar-card:hover { box-shadow: var(--shadow-lg); border-color: rgba(22, 118, 255, 0.3); }
.pillar-card:hover::before { transform: scaleX(1); }

.pillar-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--blue);
  background: var(--blue-ghost);
  padding: 5px 14px;
  border-radius: 999px;
}
.pillar-card h3 {
  font-weight: 900;
  font-size: 26px;
  letter-spacing: 0.04em;
  margin: 20px 0 12px;
  color: var(--text);
}
.pillar-card p { color: var(--muted); font-size: 15px; }

/* ============================================================
   平台生态（浅蓝分区）
   ============================================================ */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.platform-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.45s var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.platform-card::after {
  content: "";
  position: absolute;
  bottom: -70px; right: -70px;
  width: 170px; height: 170px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 118, 255, 0.12), transparent 70%);
  opacity: 0;
  transition: opacity 0.5s;
}
.platform-card:hover { border-color: rgba(22, 118, 255, 0.4); box-shadow: var(--shadow-lg); }
.platform-card:hover::after { opacity: 1; }

.platform-top { display: flex; flex-direction: column; gap: 6px; }
.platform-tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--blue-deep);
  background: var(--blue-ghost);
  border: 1px solid rgba(22, 118, 255, 0.22);
  padding: 4px 12px;
  border-radius: 999px;
}
.platform-top h3 {
  font-weight: 900;
  font-size: 30px;
  margin-top: 10px;
  color: var(--text);
  letter-spacing: 0.02em;
}
.platform-en {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--muted);
}
.platform-desc { font-size: 14px; color: var(--muted); flex: 1; }
.platform-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.platform-tags li {
  font-size: 12px;
  color: var(--blue-deep);
  background: var(--blue-ghost);
  padding: 5px 13px;
  border-radius: 6px;
  font-weight: 500;
}

/* 全链路流程（深色闭环模块） */
.flow {
  margin-top: clamp(52px, 7vw, 88px);
  background: linear-gradient(150deg, #0a1633 0%, #0c1a3a 55%, #0a1430 100%);
  border-radius: 24px;
  padding: clamp(40px, 5vw, 60px) clamp(26px, 4vw, 52px) clamp(32px, 4vw, 48px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 40px 90px rgba(10, 22, 51, 0.28);
}
.flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(90, 160, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 90% at 50% 0%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 90% at 50% 0%, #000 20%, transparent 70%);
  pointer-events: none;
}
.flow::after {
  content: "";
  position: absolute;
  top: -140px; right: -100px;
  width: 380px; height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 118, 255, 0.22), transparent 65%);
  pointer-events: none;
}

.flow-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: clamp(32px, 4vw, 46px);
  position: relative;
  z-index: 1;
}
.flow-title {
  font-weight: 900;
  font-size: clamp(21px, 2.4vw, 28px);
  color: #fff;
  letter-spacing: 0.04em;
  position: relative;
  padding-left: 20px;
}
.flow-title::before {
  content: "";
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--blue), var(--blue-light));
}
.flow-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: rgba(238, 243, 255, 0.55);
  text-align: right;
  flex-shrink: 0;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}
.flow-steps li {
  position: relative;
  padding: 26px 20px 24px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
/* 步骤之间的连接箭头 */
.flow-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -16px;
  top: 60px;
  z-index: 2;
  width: 9px; height: 9px;
  border-top: 1.5px solid rgba(90, 160, 255, 0.7);
  border-right: 1.5px solid rgba(90, 160, 255, 0.7);
  transform: rotate(45deg);
}
.flow-steps li:hover {
  background: rgba(90, 160, 255, 0.09);
  border-color: rgba(90, 160, 255, 0.5);
}
.flow-steps li:hover .step-icon {
  background: var(--blue);
  color: #fff;
}

.step-no {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--blue-light);
  display: block;
}
.step-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  background: rgba(90, 160, 255, 0.14);
  color: var(--blue-light);
  display: grid;
  place-items: center;
  margin: 16px 0 18px;
  transition: all 0.4s var(--ease);
}
.step-icon svg { width: 22px; height: 22px; }
.flow-steps b {
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
  display: block;
  margin-bottom: 6px;
}
.flow-steps span {
  font-size: 12.5px;
  color: rgba(238, 243, 255, 0.52);
  display: block;
  line-height: 1.7;
}

/* 闭环回流线 */
.flow-loop {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 30px;
  position: relative;
  z-index: 1;
}
.flow-loop-line {
  flex: 1;
  border-top: 1px dashed rgba(90, 160, 255, 0.32);
}
.flow-loop-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue-light);
  white-space: nowrap;
}
.flow-loop-label svg {
  width: 15px; height: 15px;
  animation: loop-spin 8s linear infinite;
}
@keyframes loop-spin { to { transform: rotate(360deg); } }

/* ============================================================
   方法论
   ============================================================ */
.stage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.stage-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all 0.45s var(--ease);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.stage-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, var(--blue), var(--blue-deep));
  opacity: 0;
  transition: opacity 0.45s var(--ease);
  z-index: 0;
}
.stage-card > * { position: relative; z-index: 1; transition: color 0.35s; }
.stage-card:hover { box-shadow: var(--shadow-lg); border-color: transparent; }
.stage-card:hover::after { opacity: 1; }
.stage-card:hover .stage-range,
.stage-card:hover p { color: #fff; }
.stage-card:hover .stage-name { color: rgba(255, 255, 255, 0.75); }
.stage-card:hover .stage-key { border-color: rgba(255, 255, 255, 0.4); color: #fff; }

.stage-head { margin-bottom: 18px; }
.stage-range {
  font-weight: 900;
  font-size: 36px;
  color: var(--blue);
  display: block;
  line-height: 1.2;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
}
.stage-name {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.stage-card p { font-size: 14px; color: var(--muted); margin-bottom: 24px; flex: 1; }
.stage-key {
  display: inline-block;
  align-self: flex-start;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  border: 1px solid rgba(22, 118, 255, 0.3);
  border-radius: 999px;
  padding: 7px 16px;
  color: var(--blue-deep);
  background: var(--blue-ghost);
  margin-top: auto;
}

/* ============================================================
   案例（深藏青分区，营造高级感对比）
   ============================================================ */
.section-cases { overflow: hidden; }
.section-cases::before {
  content: "";
  position: absolute;
  top: -10%; right: -10%;
  width: 44vw; height: 44vw;
  background: radial-gradient(circle, rgba(22, 118, 255, 0.16), transparent 65%);
  pointer-events: none;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--navy-2);
  border: 1px solid var(--navy-line);
  border-radius: var(--radius);
  padding: 34px 30px 30px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.45s var(--ease), background 0.45s var(--ease), transform 0.45s var(--ease);
  position: relative;
  overflow: hidden;
}
.case-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.case-card:hover {
  background: #101f44;
  border-color: rgba(90, 160, 255, 0.42);
  transform: translateY(-3px);
}
.case-card:hover::before { transform: scaleX(1); }
.case-card h3 { transition: color 0.4s; }
.case-card:hover h3 { color: var(--blue-light); }

.case-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  position: relative;
}
.case-meta span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--on-dark-muted);
  border: 1px solid var(--navy-line);
  padding: 4px 12px;
  border-radius: 999px;
}
.case-card h3 {
  font-weight: 900;
  font-size: 25px;
  letter-spacing: 0.03em;
  margin-bottom: 12px;
  position: relative;
  color: var(--on-dark);
}.case-card > p {
  font-size: 13.5px;
  color: var(--on-dark-muted);
  flex: 1;
  margin-bottom: 26px;
  position: relative;
}
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  border-top: 1px solid var(--navy-line);
  padding-top: 22px;
  position: relative;
}
.case-metrics div { text-align: center; }
.case-metrics b {
  font-weight: 900;
  font-size: clamp(17px, 1.5vw, 21px);
  color: var(--blue-light);
  display: block;
  line-height: 1.3;
  white-space: nowrap;
}
.case-metrics span { font-size: 11px; color: var(--on-dark-muted); letter-spacing: 0.04em; }

.case-note {
  margin-top: 34px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--on-dark-muted);
}

/* ============================================================
   行业覆盖
   ============================================================ */
.industries-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.industry-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.industry-list li {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--text);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 24px;
  transition: all 0.35s var(--ease);
  position: relative;
  overflow: hidden;
  cursor: default;
  box-shadow: var(--shadow-sm);
}
.industry-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--blue), var(--blue-light));
  transform: scaleY(0);
  transition: transform 0.4s var(--ease);
}
.industry-list li:hover { border-color: rgba(22, 118, 255, 0.35); color: var(--blue-deep); }
.industry-list li:hover::before { transform: scaleY(1); }

.industries-left .btn { margin-top: 34px; }

/* ============================================================
   发展历程
   ============================================================ */
.timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 9px; left: 0; right: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(22, 118, 255, 0.12), var(--blue), rgba(22, 118, 255, 0.12));
}
.timeline li { position: relative; padding-top: 34px; }
.timeline li::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 3px solid var(--blue);
  background: var(--white);
  transition: all 0.3s;
  box-shadow: 0 0 0 5px var(--tint);
}
.timeline li:hover::before { background: var(--blue); box-shadow: 0 0 0 8px rgba(22, 118, 255, 0.15); }

.tl-year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--blue);
}
.timeline h4 {
  font-weight: 900;
  font-size: 21px;
  letter-spacing: 0.04em;
  margin: 10px 0 10px;
  color: var(--text);
}
.timeline p { font-size: 13.5px; color: var(--muted); }

/* ============================================================
   联系（品牌蓝 CTA 横幅）
   ============================================================ */
.contact-banner {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  background: linear-gradient(130deg, var(--blue-deep) 0%, var(--blue) 55%, var(--blue-light) 110%);
  padding: clamp(46px, 6vw, 80px);
  color: #fff;
  box-shadow: 0 40px 80px rgba(22, 118, 255, 0.3);
  margin-bottom: 26px;
}
.contact-banner::before {
  content: "";
  position: absolute;
  top: -30%; right: -8%;
  width: 420px; height: 420px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.18);
}
.contact-banner::after {
  content: "";
  position: absolute;
  top: -8%; right: 6%;
  width: 240px; height: 240px;
  border-radius: 50%;
  border: 1.5px dashed rgba(255, 255, 255, 0.22);
}
.contact-banner-copy { position: relative; z-index: 2; max-width: 640px; }
.contact-banner .eyebrow { color: rgba(255, 255, 255, 0.75); }
.contact-banner .eyebrow i { background: #fff; }
.contact-banner h2 {
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin-top: 20px;
}
.contact-banner h2 em { font-style: normal; opacity: 0.72; }

.contact-phone {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 50px);
  letter-spacing: 0.06em;
  color: #fff;
  margin-top: 30px;
  position: relative;
}
.contact-phone::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 3px;
  border-radius: 3px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}
.contact-phone:hover::after { transform: scaleX(1); }

.contact-icon {
  position: absolute;
  right: clamp(20px, 6vw, 80px);
  bottom: -40px;
  width: clamp(180px, 22vw, 300px);
  opacity: 0.16;
  z-index: 1;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.contact-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s var(--ease);
}
.contact-item:hover { border-color: rgba(22, 118, 255, 0.35); box-shadow: var(--shadow-sm); }
.contact-item span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
}
.contact-item a, .contact-item b {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}
.contact-item a:hover { color: var(--blue); }

/* 微信商务对接卡片 */
.wechat-block { margin-top: 64px; }
.wechat-title {
  font-weight: 900;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: 0.06em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.wechat-title small {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.wechat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.wechat-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.wechat-card:hover {
  border-color: rgba(22, 118, 255, 0.4);
  box-shadow: var(--shadow-lg);
}
.wechat-qr { transition: transform 0.5s var(--ease); }
.wechat-card:hover .wechat-qr { transform: scale(1.025); }
.wechat-platform {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--blue-deep);
  background: var(--blue-ghost);
  border: 1px solid rgba(22, 118, 255, 0.22);
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.wechat-qr {
  width: 100%;
  max-width: 190px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.wechat-qr img { width: 100%; height: auto; }
.wechat-card strong {
  font-weight: 900;
  font-size: 18px;
  color: var(--text);
  letter-spacing: 0.06em;
  margin-top: 18px;
}
.wechat-role {
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

/* ============================================================
   页脚（深藏青）
   ============================================================ */
.footer {
  background: var(--navy);
  padding: 60px 0 44px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.footer-logo { height: 36px; width: auto; }
.footer-slogan {
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: 0.14em;
  color: var(--on-dark);
}
.footer-copy {
  font-size: 12px;
  color: var(--on-dark-muted);
  text-align: right;
  line-height: 2;
}

/* 页脚 SEO 关键词区 */
.footer-seo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--navy-line);
}
.footer-seo-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--on-dark-muted);
  margin-right: 4px;
}
.footer-seo a {
  font-size: 12.5px;
  color: var(--on-dark-muted);
  transition: color 0.3s;
}
.footer-seo a:hover { color: var(--blue-light); }

.footer-icp {
  margin-top: 26px;
  text-align: center;
}
.footer-icp a {
  font-size: 12px;
  color: var(--on-dark-muted);
  letter-spacing: 0.05em;
  transition: color 0.3s;
}
.footer-icp a:hover { color: var(--blue-light); }

/* ============================================================
   滚动显现动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }
.reveal[data-delay="4"] { transition-delay: 0.48s; }
.reveal[data-delay="5"] { transition-delay: 0.6s; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .stage-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 44px; }
  .timeline::before { display: none; }
  .flow-steps { grid-template-columns: repeat(3, 1fr); row-gap: 22px; }
  .flow-steps li::after { display: none; }
  .flow-head { flex-direction: column; align-items: flex-start; gap: 14px; }
  .flow-sub { text-align: left; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 30px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform 0.5s var(--ease);
    z-index: 99;
    border-left: 1px solid var(--line);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 18px; }

  .hero { padding-top: 110px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { min-height: 420px; order: -1; transform: scale(0.92); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hstat:nth-child(3)::before { display: none; }

  .pillars { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .stage-grid { grid-template-columns: 1fr; }
  .industries-inner { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .wechat-grid { grid-template-columns: 1fr 1fr; }
  .wechat-title { flex-direction: column; align-items: flex-start; gap: 4px; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: 1fr; }
  .contact-icon { opacity: 0.1; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}

@media (max-width: 520px) {
  .platform-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .industry-list { grid-template-columns: 1fr; }
  .wechat-grid { grid-template-columns: 1fr; }
  .float-card { padding: 12px 18px; }
  .fc-num { font-size: 22px; }
  .float-tag { display: none; }
  .hero-icon-card { width: 140px; height: 140px; border-radius: 32px; }
  .hero-icon-card img { width: 92px; height: 92px; }
}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}