/* ============================================================
   Shenzhen Leader Dental laboratory Co., Ltd — 全局样式
   品牌配色取自官方 Logo：
     主蓝 #54aeea (LEADER 字) / 亮蓝 #78d8fc (LD 图形)
     深蓝 #3c7eba (tagline)  / 灰  #969696 (DENTAL LAB 字)
   设计基调：白底 + 蓝色点缀，清爽、临床、可信
   ------------------------------------------------------------
   字体：Logo 为几何无衬线，故全站标题统一使用粗体无衬线
         （不使用衬线体，避免与 Logo 气质冲突）
   纯静态，无外链依赖
   ============================================================ */

:root {
  /* 品牌色 —— 全部取自 Logo 采样 */
  --brand:        #54aeea;
  --brand-deep:   #2f82c4;
  --brand-dark:   #1b5c8f;
  --brand-darker: #0e3d60;
  --sky:          #78d8fc;
  --sky-mid:      #d3eafb;
  --sky-soft:     #eaf6fe;

  /* 中性色 */
  --ink:    #1c2b3a;
  --muted:  #5f7385;
  --gray:   #96a0aa;
  --bg:     #ffffff;
  --bg-alt: #f6fbff;
  --border: #dbe8f5;

  --radius:    14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 10px rgba(28, 86, 140, 0.06);
  --shadow:    0 10px 30px rgba(28, 86, 140, 0.10);
  --shadow-lg: 0 20px 50px rgba(28, 86, 140, 0.16);

  --font-body: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-head: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--brand-deep); text-decoration: none; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 22px; }

/* ============================================================
   顶部联系条
   ============================================================ */
.topbar { background: var(--brand-dark); color: #cfe7fa; font-size: 13px; }
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 38px;
  gap: 16px;
}
.topbar-right { display: inline-flex; align-items: center; gap: 12px; }
.topbar a { color: #dff0fd; }
.topbar a:hover { color: #fff; }
.topbar .sep { color: #4d84ad; }

/* ============================================================
   页头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.25s, border-color 0.25s;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(28, 86, 140, 0.10); border-color: transparent; }

.header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }

/* Logo 锁定组合：图形 + 文字，复刻 Logo 的 LEADER / DENTAL LAB 结构 */
.logo { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo-mark { height: 46px; width: auto; }
.logo-text { display: flex; flex-direction: column; line-height: 1.05; }
.logo-text strong { font-size: 19px; font-weight: 800; letter-spacing: 0.13em; color: var(--brand); }
.logo-text small { font-size: 9px; font-weight: 600; letter-spacing: 0.30em; color: var(--gray); margin-top: 3px; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--muted);
  padding: 9px 15px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.main-nav a:hover { color: var(--brand-deep); background: var(--sky-soft); }
.main-nav a.active { color: var(--brand-deep); font-weight: 700; }

.nav-cta {
  background: var(--brand);
  color: #fff !important;
  font-weight: 600 !important;
  margin-left: 10px;
  box-shadow: 0 4px 14px rgba(84, 174, 234, 0.35);
  display: inline-flex;
}
.nav-cta:hover { background: var(--brand-deep) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  width: 26px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--brand-dark);
  transition: transform 0.25s, opacity 0.25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15.5px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.16s, background 0.2s, box-shadow 0.2s, color 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(84, 174, 234, 0.38); }
.btn-primary:hover { background: var(--brand-deep); box-shadow: 0 12px 28px rgba(47, 130, 196, 0.42); }
.btn-outline { background: #fff; color: var(--brand-deep); border: 1.5px solid var(--brand); }
.btn-outline:hover { background: var(--sky-soft); }
.btn-navy { background: var(--brand-dark); color: #fff; }
.btn-navy:hover { background: var(--brand-darker); }
/* 兼容旧类名 */
.btn-gold { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(84, 174, 234, 0.38); }
.btn-gold:hover { background: var(--brand-deep); }

/* ============================================================
   英雄区（分栏：文案 + 视觉）
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 92px;
  background:
    radial-gradient(ellipse 70% 55% at 78% 8%, rgba(120, 216, 252, 0.38), transparent 62%),
    radial-gradient(ellipse 55% 45% at 6% 92%, rgba(84, 174, 234, 0.14), transparent 62%),
    linear-gradient(180deg, #fbfdff 0%, #eef8ff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  border: 1px solid rgba(120, 216, 252, 0.35);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -200px;
  left: -140px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(120, 216, 252, 0.16), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--brand-deep);
  background: #fff;
  border: 1px solid var(--sky-mid);
  padding: 7px 17px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.hero .kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  flex: 0 0 7px;
}

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 4.2vw, 50px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--brand-darker);
  margin-bottom: 20px;
}
.hero h1 em { font-style: normal; color: var(--brand); }

.hero p { color: var(--muted); font-size: 17px; max-width: 560px; margin-bottom: 32px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }

.hero-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 26px;
  border-top: 1px dashed var(--sky-mid);
}
.hero-badges span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-dark);
  background: #fff;
  border: 1px solid var(--sky-mid);
  padding: 7px 14px;
  border-radius: 8px;
}
.hero-badges span::before {
  content: "";
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
  background: var(--brand);
  border-radius: 50%;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/contain no-repeat;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/contain no-repeat;
}

.hero-visual { position: relative; }
.hero-visual .hero-img {
  width: 100%;
  aspect-ratio: 4 / 3.4;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 6px solid #fff;
}
.hero-float {
  position: absolute;
  left: -18px;
  bottom: 26px;
  background: #fff;
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
}
.hero-float .hf-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--sky-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-deep);
}
.hero-float .hf-icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.hero-float strong { display: block; font-size: 20px; font-weight: 800; color: var(--brand-darker); line-height: 1.1; }
.hero-float span { font-size: 12.5px; color: var(--muted); }

/* ============================================================
   通用区块
   ============================================================ */
.section { padding: 84px 0; }
.section.alt { background: var(--bg-alt); }
.section.tint { background: linear-gradient(180deg, #ffffff 0%, var(--sky-soft) 100%); }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.section-head .kicker { color: var(--brand); letter-spacing: 0.18em; text-transform: uppercase; font-size: 12.5px; font-weight: 700; }
.section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(27px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--brand-darker);
  margin: 10px 0 14px;
  line-height: 1.2;
}
.section-head p { color: var(--muted); font-size: 16.5px; }

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

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--sky-mid); }
.card img { width: 100%; height: 200px; object-fit: cover; background: var(--sky-soft); }
.card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.card-body h3 {
  font-family: var(--font-head);
  color: var(--brand-darker);
  font-size: 18.5px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}
.card-body p { color: var(--muted); font-size: 14.5px; }
.card-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.9;
}
.card-meta strong { color: var(--brand-dark); font-weight: 700; }

/* 特色卡片（带图标） */
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--sky-mid); }
.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--sky) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(84, 174, 234, 0.32);
}
.feature-icon svg { width: 26px; height: 26px; fill: none; stroke: #fff; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.feature-card h3 { font-family: var(--font-head); color: var(--brand-darker); font-size: 18.5px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 14.5px; }

/* ============================================================
   统计条
   ============================================================ */
.stats {
  background:
    radial-gradient(ellipse 60% 100% at 85% 0%, rgba(120, 216, 252, 0.30), transparent 60%),
    linear-gradient(120deg, var(--brand-dark) 0%, var(--brand-deep) 100%);
  color: #fff;
  padding: 64px 0;
}
.stats .grid { text-align: center; }
.stat-number {
  font-family: var(--font-head);
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.15;
}
.stat-label { color: #cfe7fa; font-size: 14.5px; margin-top: 6px; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-banner {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 120% at 88% 10%, rgba(120, 216, 252, 0.34), transparent 62%),
    linear-gradient(120deg, var(--brand-dark) 0%, var(--brand-deep) 100%);
  color: #fff;
  text-align: center;
  padding: 70px 24px;
  border-radius: var(--radius-lg);
}
.cta-banner::before {
  content: "";
  position: absolute;
  top: -90px;
  left: -70px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.cta-banner h2 {
  position: relative;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}
.cta-banner p { position: relative; color: #d9edfc; max-width: 580px; margin: 0 auto 30px; font-size: 16px; }
.cta-banner .btn { position: relative; background: #fff; color: var(--brand-deep); box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18); }
.cta-banner .btn:hover { background: var(--sky-soft); }

/* ============================================================
   关于页
   ============================================================ */
.about-split { display: grid; grid-template-columns: 1.08fr 1fr; gap: 52px; align-items: center; }
.about-split img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 6px solid #fff; }
.about-split h2 {
  font-family: var(--font-head);
  color: var(--brand-darker);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 18px;
}
.about-split p { color: var(--muted); margin-bottom: 14px; font-size: 16px; }

.certs { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.cert-chip {
  background: #fff;
  border: 1.5px solid var(--sky-mid);
  color: var(--brand-dark);
  padding: 9px 20px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13.5px;
}

.mission-box {
  background: #fff;
  border-left: 5px solid var(--brand);
  padding: 30px 34px;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
  font-size: 18px;
  color: var(--brand-dark);
  font-weight: 500;
  line-height: 1.6;
}

/* ============================================================
   技术页 / 工作流程
   ============================================================ */
.tech-card { text-align: center; padding: 30px 24px; }
.tech-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 10px; margin-bottom: 20px; }
.tech-card h3 { font-family: var(--font-head); color: var(--brand-darker); font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.tech-card p { color: var(--muted); font-size: 14.5px; }

.timeline { counter-reset: step; max-width: 800px; margin: 0 auto; }
.timeline-item { display: flex; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--border); }
.timeline-item:last-child { border-bottom: none; }
.timeline-num {
  counter-increment: step;
  flex: 0 0 54px;
  height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand) 0%, var(--sky) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(84, 174, 234, 0.32);
}
.timeline-num::before { content: counter(step); }
.timeline-item h3 { color: var(--brand-darker); font-weight: 700; font-size: 18px; margin-bottom: 5px; }
.timeline-item p { color: var(--muted); font-size: 15px; }

/* 首页流程网格 */
.flow-grid { counter-reset: step; display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; }
.flow-step {
  text-align: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 18px 26px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.flow-step:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--sky-mid); }
.flow-step .timeline-num { counter-increment: step; margin: 0 auto 16px; flex: none; }
.flow-step h3 { color: var(--brand-darker); font-size: 15.5px; font-weight: 700; margin-bottom: 7px; }
.flow-step p { color: var(--muted); font-size: 13px; line-height: 1.6; }

/* ============================================================
   联系页
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }

.info-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 16px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.info-card:hover { border-color: var(--sky-mid); box-shadow: var(--shadow-sm); }
.info-card .icon {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--sky-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-deep);
}
.info-card .icon svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.info-card h3 { color: var(--brand-darker); font-size: 15.5px; font-weight: 700; margin-bottom: 3px; }
.info-card p, .info-card a { color: var(--muted); font-size: 14.5px; word-break: break-word; }
.info-card a:hover { color: var(--brand); }

.form-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px;
  box-shadow: var(--shadow);
}
.form-card h2 { font-family: var(--font-head); color: var(--brand-darker); font-size: 25px; font-weight: 800; margin-bottom: 6px; }
.form-card > p { color: var(--muted); font-size: 14.5px; margin-bottom: 26px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: 13.5px; color: var(--brand-dark); margin-bottom: 7px; }
.form-group label .req { color: #e05b4b; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fcfdff;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(84, 174, 234, 0.16);
}
.form-group textarea { min-height: 132px; resize: vertical; }

#form-message { margin-top: 18px; }
.success-message {
  background: #eafaf0;
  border: 1px solid #b5e6c8;
  color: #1a7a42;
  padding: 15px 18px;
  border-radius: 10px;
  font-size: 14.5px;
}
.error-message {
  background: #fdf0ee;
  border: 1px solid #f3c8c1;
  color: #b03a2e;
  padding: 15px 18px;
  border-radius: 10px;
  font-size: 14.5px;
}
.error-message a { color: #b03a2e; text-decoration: underline; font-weight: 600; }

/* ============================================================
   WhatsApp 悬浮按钮
   ============================================================ */
.wa-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25d366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(37, 211, 102, 0.42);
  transition: transform 0.2s;
}
.wa-float:hover { transform: scale(1.08); }
.wa-float svg { width: 31px; height: 31px; fill: #fff; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: var(--brand-darker); color: #b9d5ea; padding: 64px 0 0; }

.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
/* 深底上用白色版 Logo 图形 */
.footer-brand img { height: 44px; width: auto; filter: brightness(0) invert(1); opacity: 0.95; }
.footer-brand strong { color: #fff; font-size: 18px; font-weight: 800; letter-spacing: 0.13em; }
.footer-brand small { display: block; color: #7fa8c6; font-size: 9px; letter-spacing: 0.30em; font-weight: 600; margin-top: 2px; }

.footer-grid { display: grid; grid-template-columns: 1.9fr 0.9fr 1.3fr; gap: 44px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-family: var(--font-head); font-weight: 700; margin-bottom: 16px; font-size: 16px; }
.site-footer a { color: #b9d5ea; display: block; padding: 5px 0; font-size: 14.5px; }
.site-footer a:hover { color: #fff; }
.site-footer p { font-size: 14.5px; line-height: 1.7; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: #7fa8c6;
}

/* ============================================================
   子页面顶部横幅
   ============================================================ */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 78px 0 72px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 90% at 80% 5%, rgba(120, 216, 252, 0.36), transparent 62%),
    linear-gradient(180deg, #fbfdff 0%, #eef8ff 100%);
  border-bottom: 1px solid var(--border);
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -130px;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(120, 216, 252, 0.32);
  pointer-events: none;
}
.page-hero .kicker { color: var(--brand); letter-spacing: 0.18em; text-transform: uppercase; font-size: 12.5px; font-weight: 700; }
.page-hero h1 {
  position: relative;
  font-family: var(--font-head);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--brand-darker);
  margin-bottom: 12px;
}
.page-hero p { position: relative; color: var(--muted); max-width: 660px; margin: 0 auto; font-size: 16.5px; }

/* ============================================================
   滚动入场动效
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s cubic-bezier(0.22, 0.61, 0.36, 1),
              transform 0.75s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

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

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 620px; }
  .flow-grid { grid-template-columns: repeat(3, 1fr); }
}

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

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .topbar-left { display: none; }
  .topbar-inner { justify-content: center; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 10px 18px 22px;
    gap: 2px;
    display: none;
    border-top: 1px solid var(--border);
    box-shadow: 0 16px 30px rgba(28, 86, 140, 0.12);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 12px; font-size: 16px; }
  .nav-cta { margin-left: 0; margin-top: 10px; justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 68px; }
  .hero-float { left: 0; }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .flow-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 22px; }
  .section { padding: 60px 0; }
  .logo-mark { height: 40px; }
  .logo-text strong { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}