/* ============================================
   WiSRC 清宁智慧 · Design System
   奶油纸色 × 墨色 × 青 × 科技蓝
   ============================================ */

:root {
  --paper: #faf9f5;
  --ink: #1a2332;
  --teal: #2d6a6a;
  --blue: #2456c4;
  --line: #e5e2da;
  --ink-soft: #4a5568;
  --paper-deep: #f2efe8;
  --white: #ffffff;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --nav-h: 72px;
  --max-w: 1160px;
  --radius: 14px;
  --shadow-sm: 0 2px 12px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 10px 40px rgba(26, 35, 50, 0.10);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, blockquote {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }

::selection { background: rgba(36, 86, 196, 0.15); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 导航（毛玻璃） ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(250, 249, 245, 0.78);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-nav .nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand .logo {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand .logo .wi { color: var(--teal); }

.brand .logo-cn {
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: 0.3em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
}

.nav-links a {
  font-size: 17px;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.25s;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  transition: width 0.3s ease;
}

.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--ink); font-weight: 500; }

/* 预约咨询按钮：完全独立于普通链接样式 */
.nav-links a.nav-cta,
.nav-cta {
  display: inline-block;
  padding: 10px 26px;
  border: 1px solid var(--ink);
  border-radius: 999px;

  font-size: 16px;
  color: var(--ink);          /* 基础态字色锁定，不受 .nav-links a 规则影响 */
  background: transparent;
  box-shadow: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
}

/* 排除下划线伪元素：hover 时不再伸出渐变横条 */
.nav-links a.nav-cta::after { display: none; }

.nav-links a.nav-cta:hover,
.nav-cta:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(45, 106, 106, 0.35);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  transition: all 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(250, 249, 245, 0.97);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .nav-links.open { max-height: 480px; }
  .nav-links li { width: 100%; text-align: center; }
  .nav-links a { display: block; padding: 15px 0; }
  .nav-links a::after { display: none; }
  .nav-cta { margin: 12px auto; }
}

/* ---------- 页面主区 ---------- */
main { padding-top: var(--nav-h); }

section { padding: 90px 0; }
section.tight { padding: 60px 0; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 18px;
  white-space: nowrap;
  max-width: 100%;
}

/* 混排中英文的长标签：收窄字距避免溢出，仍保持单行 */
.section-label.long {
  font-size: 12px;
  letter-spacing: 0.16em;
  gap: 8px;
}
.section-label.long::before { width: 20px; }

.section-label::before,
.section-label::after {
  content: "";
  width: 28px; height: 1px;
  background: var(--teal);
  flex: none;
}
.section-label::after { display: none; }

/* 窄屏兜底：进一步压缩字号与字距，任何标签都不折行 */
@media (max-width: 520px) {
  .section-label { font-size: 11.5px; letter-spacing: 0.14em; gap: 7px; }
  .section-label.long { font-size: 11px; letter-spacing: 0.1em; }
  .section-label::before { width: 18px; }
  .section-label.long::before { width: 14px; }
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 18px;
}

.section-desc {
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 640px;
}

.center { text-align: center; }
.center .section-desc { margin: 0 auto; }
.center .section-label { justify-content: center; }
/* 居中标签：左右对称双装饰线 */
.center .section-label::before { display: flex; width: 24px; }
.center .section-label::after { display: flex; width: 24px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 60px 0;
}

.hero-watermark {
  position: absolute;
  right: -4vw;
  bottom: -8vh;
  font-family: var(--font-serif);
  font-size: clamp(120px, 22vw, 300px);
  font-weight: 700;
  color: rgba(45, 106, 106, 0.05);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.hero-glow {
  position: absolute;
  width: 520px; height: 520px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.16;
  pointer-events: none;
}

.hero-glow.teal { background: var(--teal); top: -120px; left: -140px; }
.hero-glow.blue { background: var(--blue); bottom: -160px; right: -100px; }

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  letter-spacing: 0.04em;
  margin-bottom: 22px;
}

.hero .sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--ink-soft);
  letter-spacing: 0.12em;
  margin-bottom: 42px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 18px; }

/* ---------- Hero 双栏布局（内容增强版） ---------- */
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(40px, 6vw, 90px);
  align-items: center;
  width: 100%;
}

/* 右侧信息面板：毛玻璃卡片 */
.hero-panel {
  background: rgba(245, 242, 234, 0.06);
  border: 1px solid rgba(127, 197, 197, 0.28);
  border-radius: 18px;
  padding: clamp(26px, 3vw, 40px);
  backdrop-filter: blur(10px);
}
.hero-panel .panel-label {
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--teal-bright, #5eead4);
  margin-bottom: 18px;
}
.hero-panel ul { list-style: none; margin: 0; padding: 0; }
.hero-panel li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid rgba(127, 197, 197, 0.14);
  color: rgba(245, 242, 234, 0.88);
  font-size: 15px;
  line-height: 1.7;
}
.hero-panel li:last-child { border-bottom: none; }
.hero-panel li .idx {
  font-family: var(--font-serif);
  font-size: 18px;
  color: rgba(94, 234, 212, 0.9);
  min-width: 26px;
  line-height: 1.5;
}
.hero-panel li strong {
  display: block;
  color: var(--paper);
  font-size: 16px;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}
.hero-panel .panel-note {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(245, 242, 234, 0.55);
  letter-spacing: 0.08em;
}
.hero-panel a.panel-link {
  display: inline-block;
  margin-top: 16px;
  color: rgba(94, 234, 212, 0.95);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(94, 234, 212, 0.4);
  padding-bottom: 2px;
}
.hero-panel a.panel-link:hover { border-bottom-color: rgba(94, 234, 212, 0.9); }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-panel { max-width: 560px; }
}

/* Hero 能力标签 */
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 46px;
}
.hero-chips .chip {
  padding: 8px 20px;
  border: 1px solid rgba(127, 197, 197, 0.4);
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: rgba(245, 242, 234, 0.85);
  background: rgba(127, 197, 197, 0.08);
  backdrop-filter: blur(4px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 16px;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.btn-primary {
  background: linear-gradient(120deg, var(--teal), var(--blue));
  color: #fff;
  box-shadow: 0 8px 24px rgba(36, 86, 196, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(36, 86, 196, 0.35);
}

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn-light {
  background: var(--paper);
  color: var(--ink);
}

.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ---------- 数据亮点条 ---------- */
.stats-bar {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-deep);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}

.stat { text-align: center; }

.stat .num {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  background: linear-gradient(120deg, var(--teal), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat .label {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.15em;
}

@media (max-width: 760px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 卡片系统 ---------- */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card .icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(45, 106, 106, 0.1), rgba(36, 86, 196, 0.1));
  color: var(--teal);
  margin-bottom: 20px;
}

.card .icon svg { width: 24px; height: 24px; }

.card h3 { font-size: 21px; margin-bottom: 12px; }

.card p { color: var(--ink-soft); font-size: 15px; }

.card ul {
  list-style: none;
  margin-top: 16px;
}

.card ul li {
  padding: 8px 0 8px 22px;
  position: relative;
  color: var(--ink-soft);
  font-size: 15px;
  border-bottom: 1px dashed var(--line);
}

.card ul li:last-child { border-bottom: none; }

.card ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 16px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--teal), var(--blue));
}

.card .card-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 14px;
  color: var(--blue);
  letter-spacing: 0.05em;
}

.card .card-link:hover { text-decoration: underline; }

/* ---------- 深色区块 ---------- */
.dark-section {
  background: var(--ink);
  color: rgba(250, 249, 245, 0.85);
}

.dark-section h2, .dark-section h3 { color: var(--paper); }
.dark-section .section-label { color: #7fc5c5; }
.dark-section .section-desc { color: rgba(250, 249, 245, 0.65); }

.dark-section .card {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: none;
}

.dark-section .card p, .dark-section .card ul li { color: rgba(250, 249, 245, 0.7); }

.dark-section .card .icon {
  background: rgba(127, 197, 197, 0.12);
  color: #7fc5c5;
}

/* 科技感卡片 */
.tech-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(150deg, #1a2332 0%, #22334d 60%, #2d5a6a 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 48px 40px;
  color: var(--paper);
}

.tech-card::before {
  content: "";
  position: absolute;
  top: -80px; right: -80px;
  width: 260px; height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36, 86, 196, 0.35), transparent 70%);
  pointer-events: none;
}

.tech-card h3 {
  color: var(--paper);
  font-size: 26px;
  margin-bottom: 14px;
}

.tech-card p { color: rgba(250, 249, 245, 0.75); }

.tech-card .tag {
  display: inline-block;
  margin: 16px 12px 0 0;
  padding: 5px 14px;
  border: 1px solid rgba(127, 197, 197, 0.4);
  border-radius: 999px;
  font-size: 13px;
  color: #7fc5c5;
  letter-spacing: 0.1em;
}

/* ---------- 配图组件（图片增强版） ---------- */

/* Hero 全幅背景图：深空蓝调 AI 视觉，压暗叠加保证文字可读 */
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.5;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(11, 18, 32, 0.88) 0%, rgba(11, 18, 32, 0.55) 45%, rgba(11, 18, 32, 0.35) 100%),
    linear-gradient(180deg, rgba(11, 18, 32, 0.35), rgba(11, 18, 32, 0.72));
}
.hero .container { position: relative; z-index: 1; }

/* 品牌故事：图片 + 引文组合 */
.story-figure {
  margin: 0 0 26px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}
.story-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}
.story-figure:hover img { transform: scale(1.04); }

/* 旗舰平台：图文卡片（替代原纯文字 tech-card） */
.platform-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}
.platform-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.platform-media .platform-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 88px 32px 30px;
  background: linear-gradient(180deg, transparent, rgba(11, 18, 32, 0.92) 62%);
}
.platform-media .platform-caption h3 {
  color: var(--paper);
  font-size: 24px;
  margin-bottom: 8px;
}
.platform-media .platform-caption p { color: rgba(245, 242, 234, 0.78); margin-bottom: 4px; }
.platform-media .tag {
  display: inline-block;
  margin: 10px 12px 0 0;
  padding: 5px 14px;
  border: 1px solid rgba(127, 197, 197, 0.4);
  border-radius: 999px;
  font-size: 13px;
  color: #7fc5c5;
  letter-spacing: 0.1em;
}

/* CTA 横幅背景图 */
.cta-band { position: relative; overflow: hidden; }
.cta-media {
  position: absolute;
  inset: 0;
}
.cta-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  mix-blend-mode: luminosity;
}
.cta-band .container { position: relative; z-index: 1; }

/* ---------- 引文块 ---------- */
.quote-block {
  border-left: 3px solid var(--teal);
  padding: 8px 0 8px 28px;
  margin: 30px 0;
}

.quote-block blockquote {
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--ink);
}

.quote-block cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.2em;
}

/* ---------- 流程步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 24px;
  counter-increment: step;
}

.step::before {
  content: "0" counter(step);
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 700;
  background: linear-gradient(120deg, var(--teal), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  margin-bottom: 10px;
}

.step h4 { font-size: 19px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-soft); }

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal), var(--blue));
}

.timeline-item {
  position: relative;
  padding-bottom: 44px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px; top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--teal);
}

.timeline-item .date {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--teal);
}

.timeline-item h4 { font-size: 18px; margin: 4px 0 6px; }
.timeline-item p { font-size: 15px; color: var(--ink-soft); }

/* ---------- 表单 ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }

.form-field label {
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.form-field textarea { min-height: 130px; resize: vertical; }

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(45, 106, 106, 0.12);
}

@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }

.form-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------- CTA 区 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--teal), var(--blue));
  color: #fff;
  text-align: center;
  padding: 90px 0;
}

.cta-band h2 { color: #fff; font-size: clamp(26px, 4vw, 38px); margin-bottom: 16px; }
.cta-band p { color: rgba(255, 255, 255, 0.8); margin-bottom: 36px; font-size: 17px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(250, 249, 245, 0.6);
  padding: 70px 0 30px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

@media (max-width: 860px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .logo {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--paper);
}

.footer-brand .logo .wi { color: #7fc5c5; }

.footer-brand .slogan {
  margin-top: 12px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: rgba(250, 249, 245, 0.5);
}

.site-footer h5 {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--paper);
  margin-bottom: 18px;
}

.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul a { color: rgba(250, 249, 245, 0.6); transition: color 0.25s; }
.site-footer ul a:hover { color: var(--paper); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: rgba(250, 249, 245, 0.4);
}

/* ---------- 滚动渐入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  z-index: 200;
  background: linear-gradient(90deg, var(--teal), var(--blue), #7fc5c5);
  background-size: 200% 100%;
  animation: progressFlow 4s linear infinite;
  transition: width 0.1s linear;
  pointer-events: none;
}

@keyframes progressFlow {
  0% { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}

/* ---------- 导航滚动收缩 ---------- */
.site-nav {
  transition: height 0.3s ease, background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-nav.scrolled {
  height: 60px;
  background: rgba(250, 249, 245, 0.88);
  box-shadow: 0 4px 24px rgba(26, 35, 50, 0.08);
  border-bottom-color: transparent;
}

/* ---------- Hero 极光 & 网格 ---------- */
.hero-glow {
  animation: auroraDrift 14s ease-in-out infinite alternate;
  will-change: transform;
}

.hero-glow.blue { animation-delay: -7s; }

@keyframes auroraDrift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(60px, 40px) scale(1.15); }
  100% { transform: translate(-40px, -30px) scale(0.95); }
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 106, 106, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 106, 106, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Hero 标题渐变流光 */
.hero h1 {
  background: linear-gradient(110deg, var(--ink) 18%, var(--teal) 38%, var(--blue) 50%, #4a7fe8 62%, var(--ink) 82%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmerText 7s ease-in-out infinite;
}

/* 无 background-clip:text 支持时回退为实色 */
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero h1 { background: none; -webkit-text-fill-color: currentColor; color: var(--ink); }
}

@keyframes shimmerText {
  0%, 100% { background-position: 0% 0; }
  50% { background-position: 100% 0; }
}

/* Hero 水印微动 */
.hero-watermark { animation: watermarkFloat 10s ease-in-out infinite alternate; }

@keyframes watermarkFloat {
  from { transform: translateY(0); }
  to { transform: translateY(-24px); }
}

/* ---------- 按钮扫光 ---------- */
.btn { position: relative; overflow: hidden; }

.btn-primary {
  background: linear-gradient(120deg, var(--teal), var(--blue), var(--teal));
  background-size: 200% 100%;
  animation: btnFlow 6s ease infinite;
}

@keyframes btnFlow {
  0%, 100% { background-position: 0% 0; }
  50% { background-position: 100% 0; }
}

.btn::after {
  content: "";
  position: absolute;
  top: 0; left: -80%;
  width: 50%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.btn:hover::after { left: 130%; }

/* ---------- 卡片鼠标追光 ---------- */
.card, .step {
  position: relative;
  overflow: hidden;
}

.card::before, .step::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(36, 86, 196, 0.08), transparent 65%);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
  z-index: 0;
}

.card:hover::before, .step:hover::after { opacity: 1; }

.card:hover {
  border-color: rgba(36, 86, 196, 0.28);
  box-shadow: 0 16px 44px rgba(36, 86, 196, 0.13);
}

.card > *, .step > * { position: relative; z-index: 1; }

/* step 编号置于追光之上 */
.step .step-inner { position: relative; z-index: 1; }

/* ---------- tech-card 边缘流光 ---------- */
.tech-card { position: relative; }

.tech-card::after {
  content: "";
  position: absolute;
  top: 0; left: -60%;
  width: 40%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.10), transparent);
  transform: skewX(-18deg);
  animation: techShine 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes techShine {
  0%, 55% { left: -60%; }
  85%, 100% { left: 130%; }
}

/* ---------- 数据亮点：数字计数 & 底部渐变条 ---------- */
.stats-bar {
  position: relative;
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, rgba(45, 106, 106, 0.05), transparent),
    var(--paper-deep);
}

.stats-bar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal), var(--blue), transparent);
  opacity: 0.5;
}

.stat { transition: transform 0.3s ease; }
.stat:hover { transform: translateY(-4px); }

/* ---------- CTA 动态渐变 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--teal), var(--blue), #173a8a, var(--teal));
  background-size: 300% 100%;
  animation: ctaFlow 12s ease infinite;
}

@keyframes ctaFlow {
  0%, 100% { background-position: 0% 0; }
  50% { background-position: 100% 0; }
}

.cta-band::before,
.cta-band::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  background: #7fc5c5;
  pointer-events: none;
}

.cta-band::before { width: 380px; height: 380px; top: -160px; left: -100px; animation: auroraDrift 16s ease-in-out infinite alternate; }
.cta-band::after { width: 320px; height: 320px; bottom: -160px; right: -80px; animation: auroraDrift 13s ease-in-out infinite alternate-reverse; }

.cta-band .container { position: relative; z-index: 1; }

/* ---------- 深色区氛围光 ---------- */
.dark-section {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 50% 60% at 15% 10%, rgba(45, 106, 106, 0.22), transparent),
    radial-gradient(ellipse 50% 60% at 85% 90%, rgba(36, 86, 196, 0.20), transparent),
    var(--ink);
}

/* ---------- 区块标题下划光 ---------- */
.section-title {
  position: relative;
  display: block;
  width: fit-content;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 44px; height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  transition: width 0.6s ease;
}

.section-title.visible::after { width: 88px; }

/* 居中区块：下划光条随标题居中 */
.center .section-title { margin-left: auto; margin-right: auto; }

/* ---------- 页脚顶部光线 ---------- */
.site-footer {
  position: relative;
  background:
    radial-gradient(ellipse 40% 50% at 50% 0%, rgba(45, 106, 106, 0.18), transparent),
    var(--ink);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: min(680px, 80%);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(127, 197, 197, 0.6), transparent);
}

/* ---------- 时间线节点脉冲 ---------- */
.timeline-item::before {
  box-shadow: 0 0 0 0 rgba(45, 106, 106, 0.4);
  animation: nodePulse 2.6s ease-out infinite;
}

@keyframes nodePulse {
  0% { box-shadow: 0 0 0 0 rgba(45, 106, 106, 0.45); }
  70% { box-shadow: 0 0 0 12px rgba(45, 106, 106, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 106, 106, 0); }
}

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper-deep); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--teal), var(--blue));
  border-radius: 6px;
  border: 2px solid var(--paper-deep);
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .scroll-progress, .hero-glow, .hero-watermark, .hero h1,
  .btn-primary, .tech-card::after, .cta-band, .cta-band::before, .cta-band::after,
  .timeline-item::before { animation: none !important; }
  .card::before, .step::after { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card, .btn, .btn-primary { transition: none; }
  .card:hover { transform: none; }
}

/* ============================================================
   V2 设计覆盖层 —— 深空墨蓝 × 青蓝辉光（2026-10-15 重设计）
   追加于文件末尾，靠层叠优先级整体压过上方基础层，
   可整段删除回滚。
   ============================================================ */

:root {
  --ink-deep: #0b1220;
  --ink-2: #101a2e;
  --cyan: #5eead4;
  --blue-glow: #4f8dff;
  --max-w: 1240px;
  --radius: 18px;
}

/* ---------- 全局节奏：更大的呼吸感 ---------- */
body { letter-spacing: 0.01em; }
section { padding: 120px 0; }
section.tight { padding: 84px 0; }
.section-title { font-size: clamp(30px, 4.4vw, 46px); letter-spacing: 0.02em; }
.section-desc { font-size: 17px; line-height: 1.9; }

/* ---------- 导航：更通透的悬浮玻璃 ---------- */
.site-nav {
  background: rgba(250, 249, 245, 0.6);
  -webkit-backdrop-filter: saturate(1.8) blur(22px);
  backdrop-filter: saturate(1.8) blur(22px);
  border-bottom: 1px solid rgba(26, 35, 50, 0.06);
}
.site-nav.scrolled {
  background: rgba(250, 249, 245, 0.82);
  box-shadow: 0 8px 32px rgba(26, 35, 50, 0.10);
}

/* ---------- Hero：深空墨蓝大气底 ---------- */
.hero {
  min-height: calc(100vh - var(--nav-h));
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(36, 86, 196, 0.35), transparent 60%),
    radial-gradient(ellipse 60% 70% at 15% 85%, rgba(45, 106, 106, 0.4), transparent 65%),
    linear-gradient(160deg, #0b1220 0%, #101a2e 55%, #12233a 100%);
  color: var(--paper);
}
.hero .section-label { color: var(--cyan); }
.hero .section-label::before,
.hero .section-label::after { background: var(--cyan); opacity: 0.7; }
.hero h1 {
  font-size: clamp(46px, 8vw, 108px);
  letter-spacing: 0.06em;
  line-height: 1.22;
  color: var(--paper);
  background: linear-gradient(110deg, #f5f2ea 25%, var(--cyan) 45%, var(--blue-glow) 55%, #f5f2ea 75%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 80px rgba(94, 234, 212, 0.15);
}
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero h1 { background: none; -webkit-text-fill-color: var(--paper); }
}
.hero .sub { color: rgba(245, 242, 234, 0.82); letter-spacing: 0.14em; font-size: clamp(16px, 2.2vw, 21px); }
.hero p, .hero .section-desc { color: rgba(245, 242, 234, 0.82); }
.hero .quote-block blockquote, .hero .quote-block cite { color: rgba(245, 242, 234, 0.85); }
.hero-watermark { color: rgba(94, 234, 212, 0.03); right: -2vw; bottom: -4vh; }
.hero-glow { opacity: 0.28; filter: blur(140px); }
.hero::before {
  background-image:
    linear-gradient(rgba(94, 234, 212, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 234, 212, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 95% 85% at 50% 45%, #000 25%, transparent 72%);
  mask-image: radial-gradient(ellipse 95% 85% at 50% 45%, #000 25%, transparent 72%);
}

/* ---------- 数据条：由深色横带承接 Hero ---------- */
.stats-bar {
  background:
    radial-gradient(ellipse 50% 120% at 50% 0%, rgba(36, 86, 196, 0.25), transparent 70%),
    linear-gradient(180deg, #0d1626, #0f1b30);
  border-top: 1px solid rgba(94, 234, 212, 0.14);
  border-bottom: 1px solid rgba(94, 234, 212, 0.14);
}
.stat .num {
  font-size: clamp(34px, 4.6vw, 52px);
  background: linear-gradient(120deg, var(--cyan), var(--blue-glow));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}
.stat .label { color: rgba(245, 242, 234, 0.78); letter-spacing: 0.18em; font-size: 13px; }

/* ---------- 按钮：辉光升级 ---------- */
.btn { font-size: 16px; padding: 15px 38px; font-weight: 500; letter-spacing: 0.06em; }
.btn-primary {
  background: linear-gradient(120deg, #1f8f8f, var(--blue-glow));
  box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.25), 0 12px 36px rgba(79, 141, 255, 0.35);
}
.btn-primary:hover { box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.5), 0 16px 44px rgba(79, 141, 255, 0.5); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.hero .btn-ghost, .dark-section .btn-ghost { border-color: rgba(245, 242, 234, 0.45); color: var(--paper); }
.hero .btn-ghost:hover, .dark-section .btn-ghost:hover { background: rgba(245, 242, 234, 0.12); color: var(--paper); }
.hero .btn-primary { background: linear-gradient(120deg, #1f8f8f, var(--blue-glow)); color: #fff; }
.hero .btn-ghost { border-color: rgba(245, 242, 234, 0.4); color: var(--paper); }

.dark-section .section-desc, .dark-section p { color: rgba(245, 242, 234, 0.8); }
/* 深色区内的白色步骤卡片：文字保持深色，避免被上方浅色规则覆盖 */
.dark-section .step { color: var(--ink); background: var(--white); }
.dark-section .step p { color: var(--ink-soft); }
.dark-section .step h4 { color: var(--ink); }
.cta-band p { color: rgba(255, 255, 255, 0.9); }
.site-footer, .footer-bottom, .site-footer ul a { color: rgba(245, 242, 234, 0.66); }
.site-footer ul a:hover { color: var(--paper); }
.footer-bottom { color: rgba(245, 242, 234, 0.5); }
.card {
  background: rgba(255, 255, 255, 0.75);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(26, 35, 50, 0.07);
  border-radius: var(--radius);
  padding: 44px 36px;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(79, 141, 255, 0.35);
  box-shadow:
    0 24px 56px rgba(26, 35, 50, 0.14),
    0 0 0 1px rgba(79, 141, 255, 0.08);
}
.card .icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(31, 143, 143, 0.14), rgba(79, 141, 255, 0.14));
  box-shadow: inset 0 0 0 1px rgba(31, 143, 143, 0.18);
  color: #1f8f8f;
}
.card h3 { font-size: 23px; }

/* ---------- 深色区与 CTA：更深、更聚焦 ---------- */
.dark-section {
  background:
    radial-gradient(ellipse 55% 65% at 12% 8%, rgba(45, 106, 106, 0.3), transparent 60%),
    radial-gradient(ellipse 55% 65% at 88% 92%, rgba(36, 86, 196, 0.32), transparent 60%),
    linear-gradient(160deg, #0b1220, #101a2e);
}
.dark-section .section-label { color: var(--cyan); }
.tech-card {
  background:
    radial-gradient(circle at 85% 15%, rgba(79, 141, 255, 0.25), transparent 55%),
    linear-gradient(150deg, #0f1b30, #16263f 60%, #1b3a52);
  border: 1px solid rgba(94, 234, 212, 0.18);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
}
.tech-card .tag { border-color: rgba(94, 234, 212, 0.35); color: var(--cyan); }

.cta-band {
  background: linear-gradient(120deg, #135e5e, #1c3f8f, #101a2e, #135e5e);
  background-size: 300% 100%;
}
.cta-band h2 { font-size: clamp(30px, 4.6vw, 46px); letter-spacing: 0.04em; }
.cta-band .btn-light {
  background: linear-gradient(120deg, var(--cyan), var(--blue-glow));
  color: #0b1220;
  font-weight: 600;
}
.cta-band .btn-light:hover { box-shadow: 0 16px 44px rgba(94, 234, 212, 0.35); }

/* ---------- 步骤 / 时间线：辉光数字 ---------- */
.step { border-radius: var(--radius); padding: 36px 28px; }
.step::before { font-size: 44px; }
.timeline::before { background: linear-gradient(180deg, var(--cyan), var(--blue-glow)); }

/* ---------- 页脚：更深的底 ---------- */
.site-footer { background: linear-gradient(180deg, #0b1220, #080e19); }
.site-footer::before { background: linear-gradient(90deg, transparent, rgba(94, 234, 212, 0.55), transparent); }

/* ---------- 窄屏适配微调 ---------- */
@media (max-width: 640px) {
  section { padding: 84px 0; }
  .card { padding: 32px 24px; }
}
}