/* ============================================================
   易栈云 / EZStack PMS 官网 — 公共样式表（Awwwards 级重制版）
   技术栈：原生 HTML5 + CSS3 + 原生 JS（无框架）
   设计基调：编辑式先锋 SaaS、墨黑 + 品牌蓝 + 纸白、流体字号、
            自定义光标、颗粒噪点、漂移光晕、磁吸按钮、滚动揭示
   图标：Lucide（SVG，全程禁用表情符号）
   ============================================================ */

/* ---------- 0. 本地字体（内网离线可用） ---------- */
@font-face { font-family: 'Space Grotesk'; font-style: normal; font-weight: 400; font-display: swap; src: url(../fonts/space-grotesk-1.ttf) format('truetype'); }
@font-face { font-family: 'Space Grotesk'; font-style: normal; font-weight: 500; font-display: swap; src: url(../fonts/space-grotesk-2.ttf) format('truetype'); }
@font-face { font-family: 'Space Grotesk'; font-style: normal; font-weight: 600; font-display: swap; src: url(../fonts/space-grotesk-3.ttf) format('truetype'); }
@font-face { font-family: 'Space Grotesk'; font-style: normal; font-weight: 700; font-display: swap; src: url(../fonts/space-grotesk-4.ttf) format('truetype'); }

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 墨黑 / 纸白 / 品牌蓝 三色体系 */
  --ink: #0B0D12;
  --ink-2: #13161F;
  --ink-3: #1B1F2A;
  --paper: #F3F4F6;
  --paper-2: #FBFBFD;
  --card: #FFFFFF;

  /* 品牌蓝主色 */
  --accent: #165DFF;
  --accent-2: #3B7BFF;
  --accent-3: #0A47D6;
  --accent-soft: rgba(22, 93, 255, 0.10);
  --accent-line: rgba(22, 93, 255, 0.30);

  /* 文字灰阶 */
  --text: #0B0D12;
  --text-2: #3A3F4B;
  --text-3: #6B7280;
  --text-4: #9AA1AD;

  /* 线条与描边 */
  --line: rgba(11, 13, 18, 0.09);
  --line-2: rgba(11, 13, 18, 0.16);
  --line-light: rgba(255, 255, 255, 0.10);

  /* 渐变装饰 */
  --grad-accent: linear-gradient(135deg, #165DFF 0%, #3B7BFF 55%, #6F9BFF 100%);
  --grad-ink: linear-gradient(160deg, #13161F 0%, #0B0D12 100%);
  --orb-blue: radial-gradient(circle, rgba(22, 93, 255, 0.32) 0%, transparent 68%);
  --orb-cyan: radial-gradient(circle, rgba(59, 123, 255, 0.22) 0%, transparent 68%);
  --orb-violet: radial-gradient(circle, rgba(120, 87, 255, 0.18) 0%, transparent 70%);

  /* 阴影 —— 克制、通透 */
  --shadow-sm: 0 1px 2px rgba(11, 13, 18, 0.04), 0 4px 14px rgba(11, 13, 18, 0.05);
  --shadow-md: 0 10px 30px rgba(11, 13, 18, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 13, 18, 0.12);
  --shadow-accent: 0 18px 50px rgba(22, 93, 255, 0.22);

  /* 圆角 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;

  /* 布局 */
  --nav-h: 76px;
  --maxw: 1240px;
  --gap: clamp(64px, 9vw, 120px);

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-disp: "Space Grotesk", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;

  /* 缓动（物理感） */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }
/* 开启自定义平滑滚动时由 JS 接管，关闭该能力则回退到原生平滑 */
html.has-smooth { scroll-behavior: auto; }
html:not(.has-smooth) { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  font-feature-settings: "ss01";
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; outline: none; }

/* 选区配色 */
::selection { background: var(--accent); color: #fff; }

/* ---------- 3. 全局氛围层（颗粒噪点 + 漂移光晕） ---------- */
/* 颗粒噪点：固定全屏，极低透明度叠加，营造胶片质感 */
.grain {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  opacity: 0.05; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 自定义光标 */
.cursor-dot, .cursor-ring { position: fixed; top: 0; left: 0; z-index: 9999; pointer-events: none; border-radius: 50%; }
.cursor-dot { width: 6px; height: 6px; background: var(--accent); transform: translate(-50%, -50%); }
.cursor-ring {
  width: 38px; height: 38px; border: 1.5px solid rgba(22, 93, 255, 0.5);
  transform: translate(-50%, -50%); transition: width .25s var(--ease), height .25s var(--ease),
  border-color .25s var(--ease), background-color .25s var(--ease);
}
.cursor-ring.is-hover { width: 64px; height: 64px; background: var(--accent-soft); border-color: transparent; }
.cursor-ring.is-down { width: 26px; height: 26px; }
@media (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* 漂移光晕（通用） */
.orb { position: absolute; border-radius: 50%; filter: blur(70px); pointer-events: none; z-index: 0; }
.orb--blue { background: var(--orb-blue); }
.orb--cyan { background: var(--orb-cyan); }
.orb--violet { background: var(--orb-violet); }
@keyframes drift { 0% { transform: translate(0, 0) scale(1); } 50% { transform: translate(40px, -30px) scale(1.08); } 100% { transform: translate(0, 0) scale(1); } }
.orb--anim { animation: drift 14s ease-in-out infinite; }

/* 虚线网格底纹 */
.grid-lines {
  position: absolute; inset: 0; pointer-events: none; z-index: 0; opacity: 0.5;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
          mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

/* ---------- 4. 布局工具类 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px); }
.section { position: relative; padding: var(--gap) 0; }
.section--dark { background: var(--grad-ink); color: #fff; }
.section--dark .section-title,
.section--dark .section-subtitle { color: #fff; }
.section--dark .section-subtitle { color: rgba(255, 255, 255, 0.62); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-disp); font-size: 13px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--accent); }

.section-title { font-family: var(--font-disp); font-size: clamp(28px, 4vw, 46px); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
.section-head { max-width: 760px; margin: 0 auto clamp(40px, 5vw, 64px); text-align: center; }
.section-head .section-subtitle { font-size: clamp(15px, 1.4vw, 18px); color: var(--text-3); margin-top: 14px; line-height: 1.7; }

/* ---------- 5. 顶部固定导航 ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 1000;
  background: rgba(243, 244, 246, 0.72);
  backdrop-filter: blur(16px) saturate(140%); -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid transparent; transition: border-color .4s var(--ease), background .4s var(--ease);
}
.header.scrolled { border-bottom-color: var(--line); background: rgba(243, 244, 246, 0.86); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 24px; }

.logo { display: flex; align-items: center; gap: 11px; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 11px;
  display: grid; place-items: center; box-shadow: var(--shadow-accent);
  overflow: hidden; flex-shrink: 0;
}
.logo-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.05; }
.logo-cn { font-size: 18px; font-weight: 700; letter-spacing: 0.01em; }
.logo-en { font-family: var(--font-disp); font-size: 11px; font-weight: 500; letter-spacing: 0.16em; color: var(--text-3); }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link { position: relative; padding: 9px 15px; font-size: 15px; color: var(--text-2); border-radius: 100px; transition: color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease); }
.nav-link::after { content: ""; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 1.5px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.nav-link.active::after { display: none; }

.nav-actions { display: inline-flex; align-items: center; gap: 20px; flex-shrink: 0; }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px;
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 600; border-radius: 100px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}
.nav-cta:hover { background: var(--accent); box-shadow: var(--shadow-accent); transform: translateY(-1px); }

/* 头部「登录」按钮：品牌蓝实心，白字白图标 */
.nav-login {
  display: inline-flex; align-items: center; gap: 7px; padding: 10px 20px;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 600; border-radius: 100px;
  border: 1.5px solid var(--accent);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}
.nav-login svg, .nav-login i { width: 16px; height: 16px; color: #fff; stroke: #fff; }
.nav-login:hover { background: var(--accent-3); border-color: var(--accent-3); color: #fff; box-shadow: var(--shadow-accent); transform: translateY(-1px); }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); transition: transform .3s var(--ease), opacity .3s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px; font-size: 15px; font-weight: 600; border-radius: 100px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
  white-space: nowrap; will-change: transform;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.btn-primary:hover { background: var(--accent-3); box-shadow: 0 22px 60px rgba(22, 93, 255, 0.32); transform: translateY(-2px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--ink); border: 1px solid var(--line-2); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.section--dark .btn-outline { color: #fff; border-color: rgba(255,255,255,0.28); }
.section--dark .btn-outline:hover { border-color: #fff; color: #fff; }
.btn-ghost { background: var(--accent-soft); color: var(--accent); }
.btn-ghost:hover { background: rgba(22,93,255,0.16); }
.btn-block { width: 100%; }
.btn-lg { padding: 18px 38px; font-size: 16px; }

/* ---------- 7. 卡片 ---------- */
.card {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: clamp(26px, 3vw, 36px);
  box-shadow: var(--shadow-sm); overflow: hidden;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent-line); }

/* 卡片编号标记（实验性排版） */
.card-index { font-family: var(--font-disp); font-size: 13px; font-weight: 600; color: var(--text-4); letter-spacing: 0.1em; }

.icon-box {
  width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 22px;
}
.icon-box svg { width: 26px; height: 26px; }

.card-title { font-size: clamp(18px, 1.6vw, 21px); font-weight: 700; margin-bottom: 12px; letter-spacing: -0.01em; }
.card-desc { font-size: 15px; color: var(--text-2); line-height: 1.75; }

/* 功能清单（勾选用 Lucide 图标，禁用表情） */
.feature-list { margin-top: 18px; display: grid; gap: 10px; }
.feature-list li { display: flex; align-items: flex-start; gap: 11px; font-size: 14.5px; color: var(--text-2); line-height: 1.6; }
.feature-list li svg { width: 19px; height: 19px; color: var(--accent); flex-shrink: 0; margin-top: 1px; }

/* ---------- 8. 首屏 Hero（实验性大字排版） ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: var(--nav-h); overflow: hidden; }
.hero .orb { width: 620px; height: 620px; }
.hero .orb--blue { top: -180px; right: -120px; }
.hero .orb--violet { bottom: -220px; left: -140px; width: 560px; height: 560px; }
.hero-inner { position: relative; z-index: 2; padding: 70px 0 80px; width: 100%; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 9px; padding: 8px 16px 8px 10px;
  background: rgba(255,255,255,0.7); border: 1px solid var(--line); border-radius: 100px;
  font-size: 14px; font-weight: 600; color: var(--text-2); margin-bottom: 28px; box-shadow: var(--shadow-sm);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

.hero-title { font-family: var(--font-disp); font-weight: 700; font-size: clamp(40px, 8vw, 92px); line-height: 1.02;  margin-bottom: 26px;padding-top:60px; }
.hero-title .line { display: block; overflow: hidden; }
.hero-title .line > span { display: block; }
.hero-title .accent { background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-title .outline { color: transparent; -webkit-text-stroke: 1.5px var(--ink); }

.hero-sub { font-size: clamp(16px, 1.6vw, 20px); color: var(--text-2); max-width: 640px; margin: 0 auto 38px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 首屏系统后台截图 */
.hero-shot { position: relative; z-index: 2; max-width: 1040px; margin: 64px auto -100px; border-radius: var(--r-xl); overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--line); background: var(--card); }
.hero-shot-bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.hero-shot-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--line-2); }
.hero-shot-bar i:nth-child(1) { background: #FF5F57; } .hero-shot-bar i:nth-child(2) { background: #FEBC2E; } .hero-shot-bar i:nth-child(3) { background: #28C840; }
.hero-shot-bar span { margin-left: 10px; font-size: 13px; color: var(--text-3); font-family: var(--font-disp); }
.hero-shot-body { background: var(--paper-2); margin: 18px; border-radius: var(--r-md); overflow: hidden; }
.hero-shot-body img { width: 100%; height: auto; display: block; }

/* ---------- 9. 品牌合作滚动栏（覆盖首屏截图 1/6） ---------- */
.marquee { position: relative; z-index: 3; padding: 40px 0 40px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-2); overflow: hidden; }
.marquee-label { text-align: center; font-size: 18px;font-weight:600; letter-spacing: 0.12em; color: var(--text-3); margin-bottom: 60px; font-family: var(--font-disp); text-transform: uppercase; }
.marquee-track { display: flex; gap: 56px; width: max-content; animation: marquee 32s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 600; color: var(--text-4); white-space: nowrap; transition: color .3s; }
.marquee-item svg { width: 22px; height: 22px; }
.marquee-item:hover { color: var(--ink); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 10. 核心优势网格 ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.features-grid .card .icon-box { background: var(--grad-accent); color: #fff; }
.features-grid .card:hover .icon-box { transform: rotate(-6deg) scale(1.05); }

/* ---------- 11. 全业态四宫格 ---------- */
.scenarios-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario-card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 34px 26px; text-align: center; overflow: hidden; transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease); }
.scenario-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent-line); }
.scenario-card::before { content: ""; position: absolute; inset: 0; background: var(--grad-accent); opacity: 0; transition: opacity .5s var(--ease); }
.scenario-card:hover::before { opacity: 0.05; }
.scenario-ic { width: 60px; height: 60px; margin: 0 auto 18px; border-radius: 16px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); position: relative; }
.scenario-ic svg { width: 28px; height: 28px; }
.scenario-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; position: relative; color: var(--ink); }
.scenario-desc { font-size: 14px; color: var(--text-3); position: relative; }

/* ---------- 12. 核心功能预览 ---------- */
.function-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.function-card { display: block; }
.function-card .card-title { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.function-card .arrow { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--paper); color: var(--ink); transition: background .4s var(--ease), color .4s var(--ease), transform .4s var(--ease); flex-shrink: 0; }
.function-card .arrow svg { width: 17px; height: 17px; }
.function-card:hover .arrow { background: var(--accent); color: #fff; transform: rotate(0) translateX(3px); }

/* ---------- 13. 数据统计 ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line-2); border-radius: var(--r-lg); overflow: hidden; background: var(--card); }
.stat-cell { padding: 44px 28px; text-align: center; border-right: 1px solid var(--line); position: relative; }
.stat-cell:last-child { border-right: none; }
.stat-num { font-family: var(--font-disp); font-size: clamp(38px, 4.5vw, 56px); font-weight: 700; line-height: 1; letter-spacing: -0.02em; background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { margin-top: 12px; font-size: 14.5px; color: var(--text-3); }

/* ---------- 14. 价值总结大句 ---------- */
.statement { text-align: center; max-width: 900px; margin: 0 auto; }
.statement p { font-family: var(--font-disp); font-size: clamp(22px, 3vw, 34px); font-weight: 600; line-height: 1.5; letter-spacing: -0.01em; }
.statement .hl { background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* ---------- 15. 表单 ---------- */
.form-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(28px, 4vw, 48px); box-shadow: var(--shadow-md); max-width: 860px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group.full { grid-column: 1 / -1;margin-bottom:20px; }
.form-group label { font-size: 14px; font-weight: 600; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
  padding: 14px 16px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  background: var(--paper-2); transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s;
}
.form-group select {
  -webkit-appearance: none; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 18px;
  padding-right: 44px; cursor: pointer;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); background: #fff; }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-actions { margin-top: 8px; }

/* ---------- 16. 底部 CTA（全屏渐变收尾） ---------- */
.cta-band { position: relative; padding: clamp(80px, 11vw, 140px) 0; background: var(--grad-ink); color: #fff; overflow: hidden; text-align: center; }
.cta-band .orb { width: 540px; height: 540px; }
.cta-band .orb--blue { top: -160px; left: -120px; }
.cta-band .orb--violet { bottom: -200px; right: -120px; }
.cta-band h2 { position: relative; z-index: 1; font-family: var(--font-disp); font-size: clamp(30px, 5vw, 56px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 20px; }
.cta-band p { position: relative; z-index: 1; font-size: clamp(16px, 1.6vw, 19px); color: rgba(255,255,255,0.66); max-width: 620px; margin: 0 auto 40px; line-height: 1.8; }
.cta-band .cta-actions { position: relative; z-index: 1; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-band .btn-outline { color: #fff; border-color: rgba(255,255,255,0.3); }
.cta-band .btn-outline:hover { border-color: #fff; }

/* ---------- 17. Footer ---------- */
.footer { background: var(--ink); color: #fff; padding: 72px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2.2fr 1fr 1fr 1.4fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--line-light); }
.footer .logo-cn, .footer .logo-en { color: #fff; }
.footer .logo-en { color: rgba(255,255,255,0.5); }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.8; max-width: 320px; margin-top: 18px; }
.footer-title { font-size: 15px; font-weight: 700; margin-bottom: 18px; color: #fff; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.55); transition: color .25s, padding-left .25s; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 12px; }
.footer-contact svg { width: 17px; height: 17px; color: var(--accent-2); flex-shrink: 0; }
.footer-bottom { padding-top: 24px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: #fff; }

/* ---------- 18. 产品功能页（左导航 + 右详情） ---------- */
.page-head { position: relative; padding: calc(var(--nav-h) + clamp(60px, 9vw, 110px)) 0 clamp(40px, 5vw, 64px); overflow: hidden; }
.page-head .orb { width: 480px; height: 480px; top: -160px; right: -120px; }
.page-head-inner { position: relative; z-index: 2; }
.page-head h1 { font-family: var(--font-disp); font-size: clamp(34px, 6vw, 64px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; }
.page-head p { margin-top: 18px; font-size: clamp(15px, 1.5vw, 18px); color: var(--text-2); max-width: 640px; line-height: 1.8; }

.product-layout { display: grid; grid-template-columns: 268px 1fr; gap: 48px; align-items: start; }
.product-side { position: sticky; top: calc(var(--nav-h) + 28px); background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px; box-shadow: var(--shadow-sm); }
.product-side h4 { font-size: 16px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); font-family: var(--font-disp); margin-bottom: 14px;  }
.product-side a { display: flex; align-items: center; gap: 12px; padding: 14px 14px; border-radius: var(--r-sm); font-size: 14.5px; color: var(--text-2); transition: background .3s var(--ease), color .3s, transform .3s; margin-bottom:14px;}
.product-side a svg { width: 18px; height: 18px; color: var(--text-4); transition: color .3s; }
.product-side a:hover, .product-side a.active { background: var(--accent-soft); color: var(--accent); }
.product-side a:hover svg, .product-side a.active svg { color: var(--accent); }
.product-side a.active { font-weight: 600; }

.product-content { display: flex; flex-direction: column; gap: 28px; }
.psec { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(28px, 3.4vw, 44px); box-shadow: var(--shadow-sm); scroll-margin-top: calc(var(--nav-h) + 28px); position: relative; overflow: hidden; }
.psec-tag { font-family: var(--font-disp); font-size: 12px; letter-spacing: 0.14em; color: var(--accent); text-transform: uppercase; }
.psec h3 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 700; margin: 10px 0 16px; letter-spacing: -0.01em; }
.psec p { font-size: 16px; color: var(--text-2); line-height: 1.9; margin-bottom: 22px; }
.psec .ph-img { width: 100%; aspect-ratio: 16 / 8; border-radius: var(--r-md); border: 2px dashed var(--line-2); background: var(--paper-2); display: grid; place-items: center; color: var(--text-3); gap: 12px; text-align: center; }
.psec .ph-img .ph-icon { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.psec .ph-img svg { width: 26px; height: 26px; }
.feature-shot {
  display: block;
  width: calc(100% + 2 * clamp(28px, 3.4vw, 44px));
  max-width: none;
  height: auto;
  aspect-ratio: 2 / 1;                       /* 与房态图原比例一致，锁定展示尺寸 */
  object-fit: cover;                          /* 原图比例不一致时按统一容器裁切 */
  object-position: top center;               /* 顶部对齐：浏览器模拟器装饰条始终可见 */
  margin: 0 calc(-1 * clamp(28px, 3.4vw, 44px));
}

/* ---------- 19. 价格套餐页 ---------- */
.price-calc { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(26px, 3vw, 40px); box-shadow: var(--shadow-md); margin-bottom: 40px; }

/* 分段控件 Tab */
.price-tabs { display: inline-flex; gap: 6px; padding: 6px; background: var(--paper); border: 1px solid var(--line); border-radius: 100px; position: relative; left: 50%; transform: translateX(-50%); margin-bottom: 40px; }
.price-tab { position: relative; padding: 12px 28px; border-radius: 100px; font-size: 15px; font-weight: 600; color: var(--text-2); transition: color .3s var(--ease), background .3s var(--ease), box-shadow .3s; }
.price-tab:hover { color: var(--accent); }
.price-tab.active { background: #fff; color: var(--accent); box-shadow: var(--shadow-sm); }
.price-tab .tag { position: absolute; top: -12px; right: -6px; padding: 3px 10px; border-radius: 100px; font-size: 10px; font-weight: 700; background: var(--accent); color: #fff; white-space: nowrap; box-shadow: var(--shadow-accent); }
.price-tab .tag.alt { background: #0B0D12; }

/* 房间数滑块 */
.room-wrap { max-width: 640px; margin: 0 auto 8px; text-align: center; }
.room-label { font-size: 16px; color: var(--text-2); margin-bottom: 22px; }
.room-label strong { font-family: var(--font-disp); font-size: 30px; color: var(--accent); margin: 0 6px; }
.room-range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 100px; background: var(--line-2); outline: none; }
.room-range::-webkit-slider-thumb { -webkit-appearance: none; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); cursor: pointer; box-shadow: 0 4px 14px rgba(22,93,255,0.45); border: 4px solid #fff; transition: transform .2s var(--ease); }
.room-range::-webkit-slider-thumb:hover { transform: scale(1.18); }
.room-range::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); border: 4px solid #fff; cursor: pointer; box-shadow: 0 4px 14px rgba(22,93,255,0.45); }
.room-hints { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-4); margin-top: 12px; }

/* 套餐卡片 */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.pcard { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: 36px 30px; box-shadow: var(--shadow-sm); transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease); overflow: hidden; }
.pcard:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
.pcard.popular { border: 2px solid var(--accent); box-shadow: 0 10px 40px rgba(22,93,255,0.16); }
.pcard.popular:hover { transform: translateY(-14px); }
.pcard-badge { position: absolute; top: 0; right: 0; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; padding: 7px 16px; border-bottom-left-radius: var(--r-md); }
.pcard-name { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.pcard-desc { font-size: 13.5px; color: var(--text-3); margin: 10px 0 24px; min-height: 42px; line-height: 1.6; }
.pcard-price { padding-bottom: 24px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.pcard-price .cur { font-size: 20px; font-weight: 600; vertical-align: top; }
.pcard-price .amt { font-family: var(--font-disp); font-size: 52px; font-weight: 700; line-height: 1; letter-spacing: -0.02em; color: var(--accent); }
.pcard-price .unit { font-size: 14px; color: var(--text-3); }
.pcard-price .total { margin-top: 12px; font-size: 14px; color: var(--text-2); }
.pcard-price .total strong { font-family: var(--font-disp); font-size: 19px; color: var(--ink); }
.pcard-feats { display: grid; gap: 11px; margin-bottom: 28px; }
.pcard-feats li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text-2); line-height: 1.5; }
.pcard-feats li svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; margin-top: 1px; }

/* 价格说明 */
.price-note { margin-top: 44px; background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--r-lg); padding: clamp(26px, 3vw, 38px); }
.price-note h4 { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.price-note p { font-size: 15px; color: var(--text-2); line-height: 1.85; margin-bottom: 12px; }
.price-note p:last-child { margin-bottom: 0; }
.price-note strong { color: var(--ink); }

/* ---------- 20. 服务支持页 ---------- */
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card .icon-box { width: 62px; height: 62px; border-radius: 18px; background: var(--grad-accent); color: #fff; }

/* ---------- 21. 关于我们页 ---------- */
.about-intro { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(32px, 4vw, 52px); box-shadow: var(--shadow-sm); margin-bottom: 40px; }
.about-intro h3 { font-family: var(--font-disp); font-size: clamp(24px, 3vw, 34px); font-weight: 700; margin-bottom: 20px; letter-spacing: -0.01em; }
.about-intro p { font-size: 16px; color: var(--text-2); line-height: 1.95; margin-bottom: 16px; }
.about-intro p:last-child { margin-bottom: 0; }

.vision-band { position: relative; border-radius: var(--r-xl); padding: clamp(48px, 6vw, 80px) clamp(32px, 5vw, 64px); background: var(--grad-ink); color: #fff; text-align: center; overflow: hidden; margin-bottom: 40px; }
.vision-band .orb { width: 460px; height: 460px; top: -160px; left: -120px; }
.vision-band .orb--violet { bottom: -180px; right: -120px; }
.vision-band h3 { position: relative; z-index: 1; font-family: var(--font-disp); font-size: clamp(24px, 3.4vw, 38px); font-weight: 700; margin-bottom: 16px; letter-spacing: -0.01em; }
.vision-band p { position: relative; z-index: 1; font-size: clamp(16px, 1.6vw, 19px); color: rgba(255,255,255,0.7); max-width: 760px; margin: 0 auto; line-height: 1.85; }

.qual-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.qual-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 36px 30px; text-align: center; box-shadow: var(--shadow-sm); transition: transform .5s var(--ease), box-shadow .5s var(--ease); }
.qual-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.qual-ic { width: 68px; height: 68px; margin: 0 auto 18px; border-radius: 20px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.qual-ic svg { width: 32px; height: 32px; }
.qual-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.qual-card p { font-size: 14px; color: var(--text-3); line-height: 1.7; }

/* ---------- 22. 联系我们页 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: start; }
.contact-info { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(28px, 3.4vw, 40px); box-shadow: var(--shadow-sm); }
.contact-info h3 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 22px; }
.contact-item .ci { width: 48px; height: 48px; border-radius: 13px; background: var(--accent-soft); display: grid; place-items: center; color: var(--accent); flex-shrink: 0; }
.contact-item .ci svg { width: 22px; height: 22px; }
.contact-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.wecom-qrcode { display: block; width: 140px; height: auto; margin-top: 12px; border-radius: 10px; border: 1px solid var(--line); }
.contact-forms { display: flex; flex-direction: column; gap: 28px; }
.contact-form-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-xl); padding: clamp(26px, 3vw, 38px); box-shadow: var(--shadow-sm); scroll-margin-top: calc(var(--nav-h) + 16px); }
.contact-form-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 22px; padding-bottom: 16px; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 10px; }
.contact-form-card h3 svg { width: 22px; height: 22px; color: var(--accent); }

/* ---------- 23. 弹窗 ---------- */
.modal-overlay { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; background: rgba(11,13,18,0.55); backdrop-filter: blur(6px); opacity: 0; visibility: hidden; transition: opacity .35s var(--ease), visibility .35s; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: #fff; border-radius: var(--r-xl); padding: 44px 40px; max-width: 420px; width: 90%; text-align: center; box-shadow: var(--shadow-lg); transform: translateY(24px) scale(.96); transition: transform .45s var(--ease); }
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal-ic { width: 68px; height: 68px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; margin: 0 auto 20px; }
.modal-ic svg { width: 32px; height: 32px; }
.modal h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.modal p { font-size: 15px; color: var(--text-2); line-height: 1.7; margin-bottom: 26px; }

/* ---------- 24. 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(38px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }
.reveal-up { opacity: 0; transform: translateY(60px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal-up.in { opacity: 1; transform: none; }
/* 首屏标题逐行揭示 */
.line-mask { overflow: hidden; display: block; }
.line-mask > span { display: block; transform: translateY(110%); transition: transform 1s var(--ease); transition-delay: var(--d, 0s); }
.hero-in.in .line-mask > span { transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-up, .line-mask > span { opacity: 1 !important; transform: none !important; transition: none !important; }
  .marquee-track { animation: none; }
  .orb--anim { animation: none; }
}

/* ---------- 25. 响应式 ---------- */
@media (max-width: 1024px) {
  .features-grid, .function-grid, .pricing-grid, .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { gap: 0; }
  .stat-cell:nth-child(2) { border-right: none; }
  .product-layout { grid-template-columns: 1fr; }
  .product-side { position: relative; top: 0; display: flex; gap: 8px; overflow-x: auto; padding: 14px; }
  .product-side h4 { display: none; }
  .product-side a { white-space: nowrap; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .nav-menu { position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; background: rgba(243,244,246,0.97); backdrop-filter: blur(16px); padding: 18px; gap: 4px; border-bottom: 1px solid var(--line); transform: translateY(-130%); opacity: 0; pointer-events: none; transition: transform .4s var(--ease), opacity .4s; }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { width: 100%; padding: 13px 16px; }
  .nav-cta { display: none; }
  .nav-login { padding: 9px 15px; font-size: 13px; }
  .menu-toggle { display: flex; }
  .features-grid, .function-grid, .pricing-grid, .qual-grid, .scenarios-grid, .service-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-cell { border-right: none; border-bottom: 1px solid var(--line); }
  .stat-cell:last-child { border-bottom: none; }
  .form-row { grid-template-columns: 1fr; }
  .price-tabs { display: flex; left: 0; transform: none; width: 100%; }
  .price-tab { flex: 1; padding: 12px 10px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }
  .hero-actions, .cta-band .cta-actions { flex-direction: column; }
  .hero-actions .btn, .cta-band .cta-actions .btn { width: 100%; }
}