/* =========================================================
   艾弗尼 AFUNI — 官网样式（苹果级视觉重设计）
   官方品牌色（来自 .ai 原稿） + 克制用色 + 精致留白
   动画：统一 fade-up / 标语序列编排（无 glow / pulse / typewriter / counter）
   ========================================================= */

/* ---------- 主题变量（官方精确色板） ---------- */
:root {
  /* === 官方品牌色（来自 .ai 原稿） === */
  --c-blue:       #7391D7;   /* A-蓝，主色 */
  --c-blue-deep:  #7387D7;   /* A-蓝深 */
  --c-teal:       #7DAFC3;   /* 过渡青蓝 */
  --c-mint:       #87CDAF;   /* F-青绿 */
  --c-mint-light: #8DD4A8;   /* F-薄荷 */

  /* 品牌渐变 */
  --grad-brand:   linear-gradient(135deg, #7387D7 0%, #7391D7 35%, #7DAFC3 60%, #87CDAF 85%, #8DD4A8 100%);
  --grad-subtle:  linear-gradient(135deg, #F0F4F8 0%, #E8F0F6 100%);

  /* 文字 */
  --text:         #1A1A2E;
  --text-muted:   #5C6B7A;
  --text-light:   rgba(26,26,46,0.55);

  /* 背景 */
  --bg:           #FAFBFC;
  --bg-white:     #FFFFFF;
  --bg-dark:      #1A1A2E;

  /* 圆角（苹果式：更大更圆润） */
  --radius-sm:    8px;
  --radius-md:    16px;
  --radius-lg:    24px;
  --radius-pill:  999px;

  /* 阴影（极轻！） */
  --shadow-xs:    0 1px 3px rgba(0,0,0,0.04);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:    0 4px 16px rgba(115,145,215,0.08);
  --shadow-hover: 0 8px 24px rgba(115,145,215,0.12);

  /* 导航 */
  --nav-h:       72px;
  --ease:        cubic-bezier(0.22, 1, 0.36, 1);
  --maxw:        1100px;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  margin: 0;
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, p { margin: 0; }

/* 字体分工（艺术性升级）：
   品牌字/大标题/情感文案 → ZCOOL XiaoWei（优雅显示宋体，设计感）
   次级标题/专业文案     → Noto Serif SC（衬线，专业可读）
   正文                  → Noto Sans SC（清晰可读，保持可读性优先）
   英文/数字             → DM Sans（现代几何） */

/* ① ZCOOL XiaoWei：品牌字 + 大标题 + 情感文案（仅大字号展示位置） */
.hero-title .zh,
.brand-text,
.footer-brand span,
.slogan-main,
.about-slogan,
.stats-slogan {
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", "Songti SC", serif;
}

/* ② Noto Serif SC：次级标题（专业、可读） */
.section-title,
.pillar-label,
.feature-card h3,
.adv-item h4,
.step h4,
.pillar-card h3 {
  font-family: "Noto Serif SC", "Songti SC", serif;
}

/* ③ Noto Sans SC：正文（保持可读性） */
body,
.hero-desc,
.about-intro,
.feature-card p,
.pillar-card p,
.adv-item p,
.step p,
.info-item p,
.download-lead,
.contact-form .field label {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ④ DM Sans：英文 / 数字 */
.hero-title .en,
.brand-text small,
.stat-num,
.step-num,
.footer-brand small,
.showcase-label {
  font-family: "DM Sans", "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 26px;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), opacity 0.3s var(--ease);
  will-change: transform;
}
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-pill { border-radius: var(--radius-pill); }

.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 6px 18px rgba(115,145,215,0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
/* 极微妙呼吸：透明度 0.85↔1，替代脉冲放大 */
.btn-primary:hover { opacity: 1; }
.btn-primary { animation: breath 4s ease-in-out infinite; }
@keyframes breath {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.9; }
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(26,26,46,0.22);
}
.btn-ghost:hover {
  background: rgba(115,145,215,0.08);
  transform: translateY(-2px);
}

/* 焦点可见（无障碍） */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(115,145,215,0.55);
  outline-offset: 2px;
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease),
    height 0.3s var(--ease);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { border-radius: 9px; box-shadow: var(--shadow-xs); }
.brand-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  display: flex;
  flex-direction: column;
  transition: color 0.4s var(--ease);
}
.brand-text small {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 3px;
  opacity: 0.8;
  margin-top: 2px;
}

.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--c-blue);
  border-radius: 2px;
  transition: width 0.3s var(--ease);
}
.nav-link:hover { color: var(--c-blue); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-cta { color: #fff; padding: 9px 22px; }
.nav-cta::after { display: none; }

/* 滚动后导航：白色毛玻璃 */
.navbar.scrolled {
  background: rgba(250,251,252,0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 1px 0 rgba(26,26,46,0.06);
  height: 64px;
}
.navbar.scrolled .brand-text,
.navbar.scrolled .nav-link { color: var(--text); }
.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active { color: var(--c-blue); }
.navbar.scrolled .nav-link::after { background: var(--c-blue); }
.navbar.scrolled .nav-cta { color: #fff; }

/* 汉堡按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  background: none; border: none; cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), background 0.3s;
}
.navbar.scrolled .hamburger span { background: var(--text); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉遮罩（极轻） */
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(26,26,46,0.18);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 90;
}

/* ---------- 通用 section ---------- */
.section { padding: 112px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-title {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
}
.section-sub { margin-top: 16px; color: var(--text-muted); font-size: 16px; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  color: var(--text);
  background: linear-gradient(180deg, #FAFBFC 0%, #ECF2FA 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 14vh 24px 0;
  max-width: 860px;
}
.hero-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-blue);
  margin-bottom: 22px;
}
.hero-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-bottom: 26px;
}
.hero-title .zh {
  font-size: clamp(48px, 8vw, 80px);
  font-weight: 400;
  letter-spacing: 4px;
}
.hero-title .en {
  font-size: clamp(18px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: 8px;
  color: var(--text-muted);
}

/* ---------- 核心标语：序列编排动画 ---------- */
.hero-slogan { margin: 32px 0 40px; text-align: center; }
.slogan-main {
  display: flex;
  justify-content: center;
  align-items: baseline;
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
}
.sg-aifuni {
  color: var(--text);
  opacity: 0;
  animation: fadeSlideUp 0.6s var(--ease) 0.8s both;
}
.sg-care {
  font-weight: 900;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  opacity: 0;
}
.sg-care.c1 { animation: fadeSlideUp 0.6s var(--ease) 1.3s both; }
.sg-care.c2 { animation: fadeSlideUp 0.6s var(--ease) 1.55s both; }

.slogan-sub {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
}
.sg-sep {
  width: 0; height: 1px;
  background: linear-gradient(90deg, #7391D7, #87CDAF);
  animation: lineExpand 0.6s var(--ease) 1.9s both;
}
.sg-note {
  font-family: "Noto Sans SC", sans-serif;
  font-size: clamp(14px, 2vw, 20px);
  font-weight: 400;
  letter-spacing: 6px;
  color: var(--text-muted);
  opacity: 0;
  animation: fadeSlideUp 0.6s var(--ease) 2.2s both;
}

.hero-desc {
  font-size: 17px;
  font-weight: 300;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.mouse {
  display: block;
  width: 24px; height: 38px;
  border: 2px solid rgba(26,26,46,0.25);
  border-radius: 13px;
  position: relative;
}
.wheel {
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 7px;
  margin-left: -1.5px;
  background: var(--c-blue);
  border-radius: 2px;
  animation: wheel 1.8s ease-in-out infinite;
}
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(12px); } }

/* =========================================================
   品牌展示带（门面图自然融入）
   ========================================================= */
.showcase { background: var(--bg); padding: 40px 0 112px; }
.showcase-frame {
  max-width: 1040px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(115,145,215,0.14);
  /* 轻微内描边提升精致感 */
}
.showcase-photo {
  width: 100%;
  height: auto;
  display: block;
  /* 桌面端限制高度避免过长，移动端自适应 */
  max-height: 620px;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.showcase-frame:hover .showcase-photo { transform: scale(1.02); }

.showcase-caption { text-align: center; max-width: 640px; margin: 28px auto 0; }
.showcase-label {
  display: inline-block;
  font-family: "DM Sans", sans-serif;
  font-size: 12px; font-weight: 700;
  letter-spacing: 3px;
  color: var(--c-blue);
  margin-bottom: 12px;
}
.showcase-caption p {
  font-family: "Noto Serif SC", serif;
  font-size: 17px; font-weight: 500;
  line-height: 1.8;
  color: var(--text-muted);
}

/* =========================================================
   2. 功能亮点
   ========================================================= */
.features { background: var(--bg); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border: 1px solid rgba(115,145,215,0.12);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-xs);
}
.feature-ico {
  width: 64px; height: 64px;
  display: grid; place-items: center;
  background: rgba(115,145,215,0.10);
  border-radius: 50%;
  margin-bottom: 22px;
}
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.feature-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

/* ---------- CSS 几何图标（替代 emoji） ---------- */
.geo-ico { display: block; position: relative; }
/* AI 推荐：靶心 */
.ico-ai {
  width: 38px; height: 38px; border-radius: 50%;
  border: 2px solid var(--c-blue);
}
.ico-ai::before {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--c-blue);
}
.ico-ai::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--c-blue);
}
/* 模拟填报：文档列表 */
.ico-form {
  width: 34px; height: 42px;
  border: 2px solid var(--c-blue);
  border-radius: 6px;
}
.ico-form::before {
  content: ""; position: absolute;
  top: 9px; left: 7px; right: 7px; height: 3px;
  border-radius: 2px; background: var(--c-blue);
  box-shadow: 0 8px 0 var(--c-blue), 0 16px 0 var(--c-blue);
}
/* 数据分析：柱状图 */
.ico-bars {
  width: 38px; height: 38px;
  display: flex; align-items: flex-end; gap: 5px;
}
.ico-bars i {
  flex: 1; background: var(--c-blue);
  border-radius: 3px 3px 0 0;
}
.ico-bars i:nth-child(1) { height: 45%; }
.ico-bars i:nth-child(2) { height: 72%; }
.ico-bars i:nth-child(3) { height: 100%; }
/* 专家：人物轮廓 */
.ico-user {
  width: 38px; height: 38px; border-radius: 50%;
  border: 2px solid var(--c-blue);
}
.ico-user::before {
  content: ""; position: absolute;
  top: 8px; left: 50%; transform: translateX(-50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--c-blue);
}
.ico-user::after {
  content: ""; position: absolute;
  bottom: -2px; left: 50%; transform: translateX(-50%);
  width: 24px; height: 15px; border-radius: 12px 12px 0 0;
  background: var(--c-blue);
}

/* =========================================================
   3. 数据展示（白/浅灰底 + 彩色数字，无整块渐变）
   ========================================================= */
.stats { background: var(--bg-white); padding: 88px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.stat-item {
  text-align: center;
  padding: 8px 16px;
  border-left: 1px solid rgba(26,26,46,0.08);
}
.stat-item:first-child { border-left: none; }
.stat-num {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -1px;
}
.stat-num.c-blue { color: var(--c-blue); }
.stat-num.c-teal { color: var(--c-teal); }
.stat-suffix { font-size: 0.5em; font-weight: 700; margin-left: 2px; }
.stat-label {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--text-muted);
}
.stats-slogan {
  text-align: center;
  margin-top: 48px;
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-muted);
}

/* =========================================================
   4. 关于我们
   ========================================================= */
.about { background: var(--bg); }
.about-intro {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
  font-size: 18px;
  font-weight: 400;
  line-height: 1.9;
  color: var(--text-muted);
}
.about-intro strong { color: var(--text); }

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 64px;
}
.pillar-card {
  background: var(--bg-white);
  border: 1px solid rgba(115,145,215,0.12);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-xs);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.pillar-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.pillar-label {
  display: block;
  font-size: 12px; font-weight: 700;
  letter-spacing: 2px;
  color: var(--c-blue);
  margin-bottom: 18px;
}
.pillar-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; line-height: 1.5; }
.pillar-card p { color: var(--text-muted); font-size: 15px; line-height: 1.7; }

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.adv-item {
  text-align: center;
  padding: 8px 4px;
}
.adv-ico {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  background: rgba(115,145,215,0.10);
  border-radius: 50%;
}
.adv-item h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.adv-item p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

.about-slogan {
  max-width: 680px;
  margin: 64px auto 0;
  text-align: center;
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.8;
  color: var(--text);
}

/* =========================================================
   5. APP 下载
   ========================================================= */
.download { background: var(--bg-white); }
.download-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}
.download-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 480px;
}
.dl-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.dl-btn { padding: 14px 26px; }
.dl-ico { width: 22px; height: 22px; }
.dl-text { display: flex; flex-direction: column; line-height: 1.1; text-align: left; }
.dl-text small { font-size: 11px; font-weight: 500; opacity: 0.85; }
.dl-text strong { font-size: 16px; font-weight: 700; }

.dl-scan {
  display: flex; align-items: center; gap: 8px;
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-muted);
}
.scan-ico {
  width: 20px; height: 20px;
  position: relative;
  border: 1.6px solid var(--c-blue);
  border-radius: 5px;
}
.scan-ico::before,
.scan-ico::after {
  content: ""; position: absolute;
  width: 7px; height: 7px;
  border: 1.6px solid var(--c-blue);
}
.scan-ico::before { top: 2px; left: 2px; border-right: none; border-bottom: none; }
.scan-ico::after { bottom: 2px; right: 2px; border-left: none; border-top: none; }

.download-visual { display: flex; justify-content: center; }
.app-showcase {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  padding: 44px;
  background: var(--bg);
  border: 1px solid rgba(115,145,215,0.12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}
.app-badge { border-radius: 22px; box-shadow: var(--shadow-md); }
.app-feature-list { display: grid; gap: 14px; }
.app-feature-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  color: var(--text);
}
.app-feature-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 2px 6px rgba(115,145,215,0.35);
}

/* 下载步骤：极简三步 */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 820px;
  margin: 0 auto;
}
.step { text-align: center; }
.step-num {
  width: 52px; height: 52px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  border: 1.5px solid var(--c-blue);
  color: var(--c-blue);
  font-size: 22px; font-weight: 700;
  border-radius: 50%;
}
.step h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

/* =========================================================
   6. 联系我们
   ========================================================= */
.contact { background: var(--bg); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.contact-info { display: grid; gap: 8px; }
.info-item {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 20px 4px;
  border-bottom: 1px solid rgba(26,26,46,0.06);
}
.info-item:last-child { border-bottom: none; }
.info-ico {
  flex: 0 0 44px;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(115,145,215,0.10);
  border: 1px solid rgba(115,145,215,0.18);
}
.info-item strong { display: block; font-size: 15px; margin-bottom: 4px; }
.info-item p { color: var(--text-muted); font-size: 14px; line-height: 1.6; }
.info-link { color: inherit; text-decoration: none; transition: color .2s ease; }
.info-link:hover { color: var(--c-blue); }

/* 几何小图标（联系项） */
.mk-pin {
  width: 14px; height: 14px;
  background: var(--c-blue);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  position: relative;
}
.mk-pin::after {
  content: ""; position: absolute; inset: 4px;
  background: #fff; border-radius: 50%;
}
.mk-phone {
  width: 15px; height: 15px;
  border: 1.8px solid var(--c-blue);
  border-radius: 0 7px 0 7px;
  transform: rotate(45deg);
}
.mk-mail {
  width: 18px; height: 13px;
  border: 1.6px solid var(--c-blue);
  border-radius: 3px;
  position: relative; overflow: hidden;
}
.mk-mail::before {
  content: ""; position: absolute;
  left: 50%; top: 50%;
  width: 200%; height: 1.6px;
  background: var(--c-blue);
  transform: translate(-50%,-50%) rotate(22deg);
}
.mk-clock {
  width: 16px; height: 16px;
  border: 1.6px solid var(--c-blue);
  border-radius: 50%;
  position: relative;
}
.mk-clock::before {
  content: ""; position: absolute;
  top: 3px; left: 6.5px;
  width: 1.6px; height: 5px;
  background: var(--c-blue);
}
.mk-clock::after {
  content: ""; position: absolute;
  top: 6.5px; left: 7px;
  width: 5px; height: 1.6px;
  background: var(--c-blue);
}

.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(115,145,215,0.10);
}
.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-size: 14px; font-weight: 600;
  margin-bottom: 8px;
}
.field input,
.field textarea {
  width: 100%;
  padding: 12px 4px;
  border: none;
  border-bottom: 1px solid rgba(26,26,46,0.15);
  border-radius: 0;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  transition: border-color 0.3s var(--ease);
  resize: vertical;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-light); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--c-blue);
}
.form-hint {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  min-height: 1.2em;
}
.form-hint.ok { color: #2f9e6b; }
.form-hint.err { color: #d6453d; }

/* =========================================================
   页脚
   ========================================================= */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.78);
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { border-radius: 8px; }
.footer-brand span {
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  font-size: 16px; font-weight: 700; color: #fff;
}
.footer-brand small {
  font-family: "DM Sans", sans-serif;
  font-size: 10px; font-weight: 600; letter-spacing: 3px;
  opacity: 0.7; margin-left: 4px;
}
.copyright { font-size: 13px; color: rgba(255,255,255,0.55); }
.footer-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; text-align: right; }
.beian { font-size: 13px; }
.beian a {
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.beian a:hover { color: #fff; }

/* 下载进度条 */
.dl-progress { display: flex; align-items: center; gap: 12px; margin-top: 16px; width: 100%; max-width: 360px; }
.dl-progress[hidden] { display: none; }
.dl-progress-track {
  flex: 1; height: 6px; border-radius: 999px;
  background: rgba(26,26,46,0.10); overflow: hidden;
}
.dl-progress-fill {
  display: block; height: 100%; width: 0%; border-radius: 999px;
  background: var(--grad-brand); transition: width 0.2s var(--ease);
}
.dl-progress-pct {
  font-family: "DM Sans", sans-serif; font-size: 13px; font-weight: 600;
  color: var(--c-blue); min-width: 38px; text-align: right;
}
.dl-btn.is-busy { animation: none; opacity: 0.65; cursor: progress; }
.dl-btn.is-busy .dl-text strong { font-size: 14px; }

/* =========================================================
   入场动画系统（IntersectionObserver 触发）
   ========================================================= */
.animate-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* 错峰延迟 */
.animate-in[data-delay="1"] { transition-delay: 0.1s; }
.animate-in[data-delay="2"] { transition-delay: 0.2s; }
.animate-in[data-delay="3"] { transition-delay: 0.3s; }

/* 标语序列动画关键帧 */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes lineExpand {
  from { width: 0; }
  to   { width: 60px; }
}

/* 悬停：极微妙提升 */
.hover-lift {
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* =========================================================
   响应式（3 断点）
   ========================================================= */
/* 桌面 → 平板 */
@media (max-width: 1024px) {
  .section { padding: 88px 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { gap: 44px; }
  .contact-grid { gap: 40px; }
}

/* 移动 < 768 */
@media (max-width: 767px) {
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 44px; }

  /* 导航抽屉（右侧，极轻遮罩） */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 76%;
    max-width: 300px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 26px;
    padding: 0 32px;
    background: rgba(250,251,252,0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: -10px 0 40px rgba(26,26,46,0.12);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    z-index: 95;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { color: var(--text); font-size: 18px; }
  .nav-link::after { background: var(--c-blue); }
  .nav-cta { color: #fff; width: 100%; }

  /* 单列布局 */
  .feature-grid,
  .pillars,
  .adv-grid,
  .download-grid,
  .steps,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 0;
  }
  .stat-item:nth-child(odd) { border-left: none; }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) { border-top: 1px solid rgba(26,26,46,0.08); padding-top: 28px; }

  .download-grid { gap: 40px; }
  .contact-form { padding: 30px 22px; }
  .footer-inner { flex-direction: column; text-align: center; align-items: center; }
  .footer-meta { align-items: center; text-align: center; }
  .hero-actions .btn { width: 100%; max-width: 300px; }
  .dl-buttons { justify-content: center; }
  .dl-buttons .dl-btn { flex: 1; min-width: 140px; }

  /* 品牌展示带：移动端收敛 */
  .showcase { padding: 24px 0 72px; }
  .showcase-photo { max-height: 360px; }
}

/* =========================================================
   尊重「减少动画」偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .animate-in { opacity: 1 !important; transform: none !important; }
  .sg-aifuni, .sg-care, .sg-note { opacity: 1 !important; }
  .sg-sep { width: 60px !important; }
}