/* ============================================================
   云晰星联 · 企业官网样式
   ------------------------------------------------------------
   目录：
   01 设计变量        02 基础与排版     03 通用组件（按钮/容器/标题）
   04 顶部导航        05 Hero           06 核心价值
   07 产品能力        08 客户价值场景   09 关于我们
   10 CTA             11 页脚           12 动效（渐入/光带）
   13 响应式（平板 / 手机）
   ------------------------------------------------------------
   色板：深空科技蓝底 + 冷灰中性色 + 高亮青蓝（仅按钮与数据高亮）
   ============================================================ */

/* ---------- 01 设计变量 ---------- */
:root {
  --bg: #060b16;              /* 页面最深底 */
  --bg2: #0a1322;             /* 交替区块底 */
  --panel: #0d1929;           /* 卡片底 */
  --panel-2: #101f33;         /* 卡片 hover 底 */
  --line: rgba(150, 180, 218, .13);   /* 细线：描边 / 分隔 / 网格 */
  --line-strong: rgba(150, 180, 218, .24);
  --ink: #eaf2fc;             /* 主文字 */
  --ink2: #a9bacf;            /* 次级文字（冷灰） */
  --ink3: #6d8099;            /* 弱文字 */
  --accent: #37e2f2;          /* 高亮青蓝：只给按钮、数据、指示条 */
  --blue: #4b8cf7;            /* 渐变辅色 */
  --grad-accent: linear-gradient(135deg, #2ec9de, #4b8cf7);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1200px;
  --nav-h: 68px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

/* ---------- 02 基础与排版 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }                       /* 全局平滑滚动 + 锚点流畅 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }                       /* 系统减弱动效时全部交给静态 */
}
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;                                   /* 兜底：手机端绝不出横向滚动条 */
}
::selection { background: rgba(55, 226, 242, .28); }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
em { font-style: normal; color: var(--accent); }

/* 锚点落点让出固定导航的高度 */
section[id], main[id] { scroll-margin-top: calc(var(--nav-h) + 12px); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 28px; }

/* 细线网格背景装饰（Hero / 能力区 / CTA 复用）：
   两层 1px 线性渐变叠加出 72px 方格，上下用渐变蒙版淡出，避免"满屏格子" */
.grid-bg { position: relative; }
.grid-bg::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 12%, #000 82%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 12%, #000 82%, transparent);
}

/* ---------- 03 通用组件 ---------- */
/* 区块标题：小字 Kicker + 大标题 + 引句，信息层级固定三段 */
.sec { padding: 96px 0; position: relative; }
.sec-alt { background: var(--bg2); }
.sec-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.kicker {
  font-size: 13px; letter-spacing: .32em; text-indent: .32em;
  color: var(--accent); font-weight: 600; margin-bottom: 14px;
}
h2 { font-size: clamp(28px, 3.4vw, 42px); line-height: 1.25; font-weight: 700; letter-spacing: .01em; }
.sec-lead { margin-top: 14px; color: var(--ink2); font-size: clamp(15px, 1.4vw, 17px); }

/* 按钮：触控尺寸 ≥44px；主按钮用高亮青蓝（全站唯一大色块） */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 26px;
  border-radius: 12px; border: 1px solid transparent;
  font-size: 15.5px; font-weight: 600; letter-spacing: .04em;
  cursor: pointer; white-space: nowrap;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease,
              background-color .18s ease, border-radius .18s ease, color .18s ease;
}
.btn-primary {
  background: var(--grad-accent); color: #04121c;
  box-shadow: 0 6px 22px rgba(46, 201, 222, .22);
}
.btn-primary:hover {
  transform: translateY(-1px); border-radius: 18px;
  box-shadow: 0 10px 30px rgba(46, 201, 222, .34);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: rgba(150, 180, 218, .04); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); border-radius: 18px; background: rgba(55, 226, 242, .06); }
.btn-lg { min-height: 52px; padding: 0 34px; font-size: 16.5px; }

/* ---------- 04 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  height: var(--nav-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.nav.scrolled {
  background: rgba(6, 11, 22, .72);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
          backdrop-filter: blur(14px) saturate(150%);
  border-bottom-color: var(--line);
}
/* ⚠️ 抽屉打开时必须去掉导航条的 backdrop-filter：
   Chrome 里 backdrop-filter 会让后代的 position:fixed 相对导航条（60px 高）定位，
   全屏抽屉就会"缩"进导航条、页面内容穿透（实测 bug）。
   打开时导航条本身被抽屉盖住，毛玻璃去掉无感知。 */
.nav.menu-open {
  -webkit-backdrop-filter: none;
          backdrop-filter: none;
}
.nav-inner { height: 100%; display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; letter-spacing: .06em; }
.logo-mark { width: 30px; height: 30px; color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.nav-links a:not(.btn) {
  position: relative; font-size: 15px; color: var(--ink2); padding: 8px 2px;
  transition: color .18s ease;
}
.nav-links a:not(.btn)::after {                    /* 导航下划线：细线滑入 */
  content: ""; position: absolute; left: 50%; bottom: 0; height: 2px; width: 0;
  background: var(--accent); border-radius: 1px;
  transform: translateX(-50%); transition: width .22s ease;
}
.nav-links a:not(.btn):hover { color: var(--ink); }
.nav-links a:not(.btn):hover::after,
.nav-links a.on:not(.btn)::after { width: 22px; }
.nav-links a.on:not(.btn) { color: var(--ink); }
.nav-cta { margin-left: 4px; }
.nav-cta-m { display: none; }                     /* 移动端菜单内的按钮，PC 隐藏 */

/* 汉堡按钮（仅移动端） */
.nav-toggle {
  display: none; width: 44px; height: 44px; margin-left: auto;
  border: 1px solid var(--line-strong); border-radius: 10px;
  background: transparent; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle i { display: block; width: 18px; height: 1.8px; background: var(--ink); border-radius: 1px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle.open i:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav-toggle.open i:nth-child(2) { opacity: 0; }
.nav-toggle.open i:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* ---------- 05 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: 92vh; display: flex; align-items: center;
  padding: calc(var(--nav-h) + 64px) 0 96px;
  background:
    radial-gradient(1100px 620px at 78% -10%, rgba(75, 140, 247, .16), transparent 62%),
    radial-gradient(900px 520px at 6% 110%, rgba(46, 201, 222, .10), transparent 60%),
    linear-gradient(180deg, #081120 0%, var(--bg) 100%);
}
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

/* 缓慢扫动的光带：一条斜向渐变每 12s 扫过一次，亮度极低（性能友好、不抢内容） */
.hero::after {
  content: ""; position: absolute; top: -20%; bottom: -20%; left: 0; width: 46%;
  background: linear-gradient(105deg, transparent, rgba(55, 226, 242, .055) 48%, transparent);
  transform: translateX(-120%);
  animation: sweep 12s ease-in-out infinite;
  pointer-events: none;
}
@keyframes sweep {
  0%   { transform: translateX(-120%); }
  55%  { transform: translateX(260%); }
  100% { transform: translateX(260%); }
}

.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  gap: 56px; align-items: center;
}
.hero h1 {
  /* PC 一行放下"全链路会务协同平台"九个字：字号上限与文案栏宽配套
     （9 字 × 62px ≈ 558px < 栏宽 609px；1025–1200px 由 5.2vw 兜底） */
  font-size: clamp(38px, 5.2vw, 62px); line-height: 1.18;
  font-weight: 800; letter-spacing: .015em;
  background: linear-gradient(180deg, #f4f9ff 30%, #b9d0ea 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero .slogan { color: var(--accent); font-weight: 600; }
.hero-sub { margin-top: 22px; max-width: 560px; color: var(--ink2); font-size: clamp(15px, 1.5vw, 17.5px); }
.hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13.5px; color: var(--ink3); letter-spacing: .05em; }
.m-br { display: none; }                          /* 手机端才断行的 <br> */

/* 大数字统计条：5 / 4 / 1，青蓝竖线做强调（数据高亮允许用色） */
.hero-stats { display: flex; gap: 40px; margin-top: 34px; }
.hs { position: relative; padding-left: 16px; }
.hs::before {
  content: ""; position: absolute; left: 0; top: 5px; bottom: 7px; width: 2px;
  background: var(--grad-accent); border-radius: 1px; opacity: .85;
}
.hs b { display: block; font-size: 36px; font-weight: 800; line-height: 1.15; letter-spacing: .02em; }
.hs span { font-size: 12.5px; color: var(--ink3); letter-spacing: .04em; }

/* 产品界面轮廓：玻璃卡片 + 迷你驾驶舱（纯 CSS/SVG，无图片） */
.mock {
  position: relative;
  background: linear-gradient(165deg, rgba(20, 34, 56, .92), rgba(10, 18, 32, .88));
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(2, 6, 16, .6), inset 0 1px 0 rgba(255, 255, 255, .06);
  overflow: hidden;
  animation: floaty 7s ease-in-out infinite alternate;
}
@keyframes floaty { from { transform: translateY(-6px); } to { transform: translateY(8px); } }
.mock-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
}
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(150, 180, 218, .22); }
.mock-bar span { margin-left: 8px; font-size: 12.5px; color: var(--ink3); letter-spacing: .08em; }
.mock-body { padding: 18px 20px 20px; }
.mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.ms {
  background: rgba(150, 180, 218, .05);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px;
}
.ms b { display: block; font-size: 22px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.ms b i { font-style: normal; font-size: 13px; margin-left: 2px; }
.ms span { font-size: 12px; color: var(--ink3); }
.ms em.up { font-style: normal; color: var(--accent); opacity: .85; font-size: 11px; }
/* 会前报名量柱图：T-9 → T-0，蓝色系柱体，只有最后一根用青蓝高亮（临近开会报名陡增） */
.mock-bars {
  display: flex; align-items: flex-end; gap: 6px;
  height: 96px; margin-top: 16px;
  padding-bottom: 2px; border-bottom: 1px solid var(--line);
}
.mock-bars i {
  flex: 1 1 0; height: var(--h, 30%);
  background: linear-gradient(180deg, rgba(75, 140, 247, .78), rgba(75, 140, 247, .30));
  border-radius: 3px 3px 0 0;
}
.mock-bars i.hot { background: linear-gradient(180deg, rgba(55, 226, 242, .95), rgba(55, 226, 242, .35)); }
.mock-axis { display: flex; justify-content: space-between; margin-top: 6px; font-size: 11px; color: var(--ink3); letter-spacing: .06em; }
/* 议程排期进度：排了没排，一场大会的真实进度 */
.mock-prog { margin-top: 14px; display: grid; gap: 9px; }
.mp { display: grid; grid-template-columns: 58px 1fr 36px; gap: 10px; align-items: center; }
.mp span { font-size: 12px; color: var(--ink2); }
.mp .bar { display: block; height: 5px; background: rgba(150, 180, 218, .14); border-radius: 3px; overflow: hidden; }
.mp .bar i { display: block; height: 100%; background: var(--grad-accent); border-radius: 3px; }
.mp b { font-size: 11.5px; font-weight: 600; color: var(--ink2); text-align: right; }
.mp.dim .bar i { background: rgba(150, 180, 218, .32); }
.mp.dim b { color: var(--ink3); }

/* 下滑提示：一根呼吸的细线 */
.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  width: 1px; height: 42px; overflow: hidden; opacity: .6;
}
.scroll-hint i {
  display: block; width: 100%; height: 100%;
  background: linear-gradient(to bottom, transparent, var(--accent));
  animation: drop 2.2s ease-in-out infinite;
}
@keyframes drop {
  0% { transform: translateY(-100%); }
  60%, 100% { transform: translateY(100%); }
}

/* ---------- 06 核心价值（4 卡） ---------- */
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px 28px;
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}
.value-card:hover { transform: translateY(-4px); border-color: rgba(55, 226, 242, .35); background: var(--panel-2); }
.value-card .num {
  display: block; font-size: 13px; letter-spacing: .2em;
  color: var(--ink3); margin-bottom: 40px;
}
.value-card .num::after {                          /* 编号下的细线，hover 点亮 */
  content: ""; display: block; width: 26px; height: 2px; margin-top: 10px;
  background: var(--line-strong); transition: background-color .2s ease;
}
.value-card:hover .num::after { background: var(--accent); }
.value-card h3 { font-size: 19px; margin-bottom: 10px; }
.value-card p { font-size: 14.5px; color: var(--ink2); }

/* ---------- 07 产品能力（6 卡） ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease, box-shadow .2s ease;
}
.cap-card:hover {
  transform: translateY(-4px);
  border-color: rgba(55, 226, 242, .35);
  background: var(--panel-2);
  box-shadow: 0 18px 44px rgba(2, 6, 16, .45);
}
.cap-ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: 14px;
  color: var(--blue);
  background: rgba(75, 140, 247, .10);
  border: 1px solid rgba(75, 140, 247, .22);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.cap-ico svg { width: 26px; height: 26px; }
.cap-card:hover .cap-ico { color: var(--accent); border-color: rgba(55, 226, 242, .4); background: rgba(55, 226, 242, .10); }
.cap-card h3 { font-size: 18px; margin: 18px 0 8px; }
.cap-card p { font-size: 14.5px; color: var(--ink2); }
/* 阶段标签：这张能力属于会务交付的哪一段 */
.cap-stage {
  display: inline-block; margin-top: 16px;
  font-size: 11.5px; letter-spacing: .14em; text-indent: .14em;
  color: var(--ink3); border: 1px solid var(--line-strong);
  border-radius: 999px; padding: 4px 12px;
  transition: color .2s ease, border-color .2s ease;
}
.cap-card:hover .cap-stage { color: var(--accent); border-color: rgba(55, 226, 242, .4); }

/* ---------- 08 客户价值场景（3 卡） ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--line-strong);         /* 顶部细线，hover 换强调色 */
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}
.sol-card:hover { transform: translateY(-4px); border-top-color: var(--accent); background: var(--panel-2); }
.sol-tag {
  display: inline-block; font-size: 12.5px; letter-spacing: .18em; text-indent: .18em;
  color: var(--accent); border: 1px solid rgba(55, 226, 242, .35);
  border-radius: 999px; padding: 5px 14px; margin-bottom: 18px;
}
.sol-card h3 { font-size: 18.5px; line-height: 1.5; margin-bottom: 14px; }
.sol-card ul { list-style: none; }
.sol-card li {
  position: relative; padding: 7px 0 7px 20px;
  font-size: 14px; color: var(--ink2);
}
.sol-card li::before {                             /* 列表点：短横线 */
  content: ""; position: absolute; left: 2px; top: 17px;
  width: 8px; height: 1.6px; background: var(--accent); opacity: .75;
}

/* ---------- 09 关于我们 ---------- */
.about-inner {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
  gap: 56px; align-items: center;
}
.about-copy .kicker { margin-bottom: 14px; }
.about-copy h2 { margin-bottom: 20px; }
.about-p { color: var(--ink2); font-size: clamp(15px, 1.5vw, 17px); max-width: 540px; }
.about-motto { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 30px; max-width: 540px; }
.motto {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px;
}
.motto-k { display: block; font-size: 12.5px; color: var(--ink3); letter-spacing: .14em; margin-bottom: 8px; }
.motto strong { font-size: 16.5px; color: var(--ink); letter-spacing: .02em; }
/* 公司品牌墙：豆包原版 logo 图（白底整标），白卡展示保证色彩还原 */
.brand-wall {
  background: #fff;
  border: 1px solid rgba(20, 64, 110, .12);
  border-radius: 18px;
  padding: 40px 32px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 24px 60px rgba(2, 6, 16, .38);
}
.ym-logo { width: min(340px, 72%); height: auto; display: block; }
/* 页脚公司小标：原版圆徽裁切图放进白色圆片，缩小后依然清楚 */
.foot-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; flex: 0 0 auto;
  background: #fff; border-radius: 50%;
  overflow: hidden;
}
.foot-mark img { width: 22px; height: 22px; object-fit: cover; border-radius: 50%; }
.foot-copy { display: inline-flex; align-items: center; gap: 9px; }

/* ---------- 10 底部 CTA ---------- */
.cta {
  position: relative; overflow: hidden;
  padding: 110px 0;
  text-align: center;
  background:
    radial-gradient(760px 380px at 50% 120%, rgba(46, 201, 222, .14), transparent 65%),
    linear-gradient(180deg, var(--bg) 0%, #0a1626 100%);
  border-top: 1px solid var(--line);
}
.cta h2 { font-size: clamp(30px, 4vw, 48px); }
.cta-inner p { margin-top: 16px; color: var(--ink2); font-size: clamp(15px, 1.6vw, 17.5px); }
.cta-btns { display: flex; gap: 14px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }
.cta-btns .btn { min-width: 168px; }

/* 联系卡：常驻 CTA 区，二维码放白卡上保证可扫 */
.cta-contact {
  display: flex; align-items: center; gap: 20px;
  width: fit-content; margin: 30px auto 0;
  background: rgba(13, 24, 41, .72);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 26px 16px 16px;
  text-align: left;
}
.cc-qr {
  flex: 0 0 auto; width: 116px; height: 116px;
  background: #fff; border-radius: 12px; padding: 7px;
}
.cc-qr img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
.cc-info { display: flex; flex-direction: column; gap: 6px; }
.cc-info b { font-size: 17px; letter-spacing: .02em; }
.cc-tel {
  font-size: 26px; font-weight: 800; letter-spacing: .04em;
  color: var(--accent); font-variant-numeric: tabular-nums;
  transition: opacity .18s ease;
}
.cc-tel:hover { opacity: .8; }
.cc-info > span:last-child { font-size: 12.5px; color: var(--ink3); max-width: 320px; }


/* ---------- 11 页脚 ---------- */
.foot { border-top: 1px solid var(--line); background: #050a13; padding: 56px 0 0; }
/* 页脚只保留品牌块（导航/联系方式列已按柳毅要求移除，联系方式在 CTA 联系卡与弹层） */
.foot-grid { padding-bottom: 40px; }
.foot-brand p { margin-top: 16px; font-size: 14px; color: var(--ink3); line-height: 1.9; }
.foot-col { display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: var(--ink2); }
.foot-col b { font-size: 13px; letter-spacing: .18em; color: var(--ink3); margin-bottom: 6px; font-weight: 600; }
.foot-col a { color: var(--ink2); transition: color .18s ease; }
.foot-col a:hover { color: var(--accent); }
.foot-bar {
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  padding-top: 20px; padding-bottom: 26px;
  border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--ink3);
}
.foot-bar a { color: var(--ink3); transition: color .18s ease; }
.foot-bar a:hover { color: var(--accent); }

/* ---------- 联系咨询弹层 ----------
   [data-contact] 按钮打开；× / 遮罩 / ESC 关闭；打开时锁背景滚动（复用 .nav-lock） */
.cmodal {
  position: fixed; inset: 0; z-index: 120;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: rgba(4, 8, 16, .68);
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
}
.cmodal[hidden] { display: none; }
.cmodal-box {
  position: relative;
  width: 100%; max-width: 480px;
  background: linear-gradient(170deg, #101d31, #0b1524);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 30px 30px 28px;
  box-shadow: 0 34px 90px rgba(2, 6, 16, .65), inset 0 1px 0 rgba(255, 255, 255, .06);
  animation: cpop .24s ease;
}
@keyframes cpop { from { opacity: 0; transform: translateY(14px) scale(.97); } }
.cmodal-x {
  position: absolute; top: 14px; right: 14px;
  width: 40px; height: 40px;
  border: 1px solid var(--line-strong); border-radius: 10px;
  background: transparent; color: var(--ink2);
  font-size: 22px; line-height: 1; cursor: pointer;
  transition: color .18s ease, border-color .18s ease;
}
.cmodal-x:hover { color: var(--ink); border-color: var(--accent); }
.cmodal-box h3 { font-size: 22px; line-height: 1.4; }
.cmodal-sub { margin-top: 8px; font-size: 14px; color: var(--ink2); }
.cmodal-body {
  display: flex; align-items: center; gap: 22px;
  margin-top: 22px; padding-top: 22px;
  border-top: 1px solid var(--line);
}
.cm-qr {
  flex: 0 0 auto; width: 150px;
  background: #fff; border-radius: 14px; padding: 9px;
}
.cm-qr img { width: 100%; height: auto; display: block; border-radius: 8px; }
.cm-info { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.cm-name { font-size: 14.5px; color: var(--ink2); letter-spacing: .04em; }
.cm-info > span { font-size: 13px; color: var(--ink3); }
.cm-tel {
  font-size: 26px; font-weight: 800; letter-spacing: .03em;
  color: var(--accent); font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transition: opacity .18s ease;
}
.cm-tel:hover { opacity: .8; }
.cm-hint { font-size: 12px; color: var(--ink3); }

/* 手机端：联系卡与弹层竖排适配 */
@media (max-width: 767px) {
  .cmodal-body { flex-direction: column; text-align: center; }
  .cm-qr { width: 172px; }
  .cm-tel { font-size: 27px; }
}

/* ---------- 12 动效：滚动渐入 ----------
   .reveal 初始下移 + 全透明；进入视口由 JS 加 .in。
   delay-1/2/3 提供同屏卡片内的节奏错峰；整个体系尊重系统"减弱动效"。 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.delay-1 { transition-delay: .08s; }
.delay-2 { transition-delay: .16s; }
.delay-3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero::after, .mock, .scroll-hint i { animation: none; }
}

/* ---------- 13 响应式 ----------
   三档：≥1200 宽屏（默认） / 768–1200 平板 / ＜768 手机
   内容与 PC 完全一致，只调布局与字号 */

/* —— 平板 —— */
@media (max-width: 1200px) {
  .container { padding: 0 24px; }
  .hero-inner { gap: 40px; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .sec { padding: 80px 0; }
}

@media (max-width: 1024px) {
  /* 平板窄段：Hero 变单列，产品轮廓移到文案下方 */
  .hero { min-height: 0; padding-top: calc(var(--nav-h) + 56px); }
  .hero-inner { grid-template-columns: 1fr; }
  .mock { max-width: 560px; }
  .about-inner { grid-template-columns: 1fr; gap: 36px; }
  .about-visual { max-width: 640px; }
}

/* —— 手机 —— */
@media (max-width: 767px) {
  :root { --nav-h: 60px; }
  .container { padding: 0 20px; }
  .sec { padding: 64px 0; }

  /* 导航：链接收进全屏抽屉，汉堡按钮出现 */
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed; inset: 0; z-index: 80;
    flex-direction: column; justify-content: center; align-items: center; gap: 8px;
    background: rgba(5, 9, 18, .92);
    -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
    opacity: 0; visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .28s ease, transform .28s ease, visibility .28s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a:not(.btn) { font-size: 21px; padding: 15px 10px; }   /* 触控 ≥44px */
  .nav-cta-m { display: block; margin-top: 22px; }
  body.nav-lock { overflow: hidden; }               /* 抽屉打开时锁背景滚动 */

  .m-br { display: inline; }
  .hero { padding-top: calc(var(--nav-h) + 44px); padding-bottom: 72px; }
  .hero-sub { margin-top: 18px; }
  .hero-cta { margin-top: 28px; }
  .hero-cta .btn { flex: 1 1 auto; }                /* 双按钮撑满一行，拇指好按 */
  .hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
  .hs { padding-left: 12px; }
  .hs b { font-size: 27px; }
  .hs span { font-size: 11.5px; letter-spacing: 0; }
  .mock { animation: none; }                        /* 小屏去掉浮动，省电省性能 */
  .mock-bars { height: 64px; gap: 4px; }
  .mp { grid-template-columns: 62px 1fr 34px; }
  .cta-contact { flex-direction: column; text-align: center; padding: 16px 18px; gap: 10px; margin-top: 24px; max-width: 100%; }
  .cc-qr { width: 102px; height: 102px; padding: 6px; }
  .cc-info { align-items: center; gap: 5px; }
  .cc-info b { font-size: 15.5px; }
  .cc-info > span:last-child { max-width: none; }
  .cc-tel { font-size: 22px; }
  .scroll-hint { display: none; }

  .sec-head { margin-bottom: 36px; }
  .value-grid, .cap-grid, .sol-grid { grid-template-columns: 1fr; gap: 14px; }
  .value-card { padding: 24px 22px 22px; }
  .value-card .num { margin-bottom: 26px; }

  .about-motto { grid-template-columns: 1fr; }
  .foot-brand { display: flex; flex-direction: column; align-items: center; text-align: center; }
  .foot-bar { flex-direction: column; align-items: center; }
}

/* —— 768–1024：导航多了「云析课件通」后，这一档要收字号与间距，否则中文会被拆成两行 —— */
@media (min-width: 768px) and (max-width: 1024px) {
  .nav-inner { gap: 14px; }
  .logo { font-size: 17px; gap: 8px; }
  .logo-mark { width: 26px; height: 26px; }
  .nav-links { gap: 14px; }
  .nav-links a:not(.btn) { font-size: 13.5px; padding: 8px 1px; white-space: nowrap; }
  .nav-cta { min-height: 40px; padding: 0 16px; font-size: 13.5px; margin-left: 0; }
}