/* 禾川风主页样稿样式 —— KRMC 品牌紫 × 禾川版式语言 */
:root {
  --brand: #6d28d9;
  --brand-2: #4f46e5;
  --brand-3: #8b5cf6;
  --grad: linear-gradient(92deg, #7c3aed, #4f46e5);
  --grad-d: linear-gradient(100deg, #3b0f7a, #5b21b6 45%, #3b5bdb);
  --ink: #14161f;
  --ink-2: #3a3f52;
  --muted: #7a7f93;
  --bg: #ffffff;
  --bg-gray: #f5f6fa;
  --line: #e8eaf2;
  --shadow: 0 18px 50px rgba(60, 40, 140, 0.12);
  --r: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; }
.wrap { width: min(1280px, 92vw); margin: 0 auto; }

/* ---------- 顶部导航（禾川式黑底） ---------- */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 100; background: #0b0d14; transition: box-shadow .3s; }
.nav-in { width: min(1380px, 96vw); margin: 0 auto; height: 74px; display: flex; align-items: center; gap: 40px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand img { height: 40px; }
.brand-name { font-size: 20px; letter-spacing: 2px; font-weight: 700; line-height: 1.15; }
.menu { display: flex; gap: 6px; margin-left: auto; }
.menu a { color: #cfd3e0; font-size: 15px; padding: 8px 18px; position: relative; transition: color .25s; }
.menu a:hover, .menu a.on { color: #fff; }
.menu a.on::after { content: ""; position: absolute; left: 50%; transform: translateX(-50%); bottom: -2px; width: 26px; height: 3px; border-radius: 2px; background: var(--grad); }
.nav-tools { display: flex; align-items: center; }
.nav-tools .en { color: #cfd3e0; font-size: 14px; display: flex; align-items: center; gap: 6px; margin-right: 18px; }
.nav-search { width: 74px; height: 74px; background: var(--grad); display: grid; place-items: center; cursor: pointer; flex: none; transition: filter .2s; }
.nav-search svg { width: 22px; height: 22px; stroke: #fff; }
.nav-search:hover { filter: brightness(1.08); }

/* 汉堡按钮（窄屏显示） */
.hamburger { display: none; width: 42px; height: 42px; margin-right: 8px; flex: none; border: 0; background: transparent; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; border-radius: 2px; background: #cfd3e0; transition: transform .3s ease, opacity .2s ease, background .2s; }
.hamburger:hover span { background: #fff; }
.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); }

/* 站内搜索面板 */
.search-panel { display: none; position: absolute; top: 74px; left: 0; right: 0; background: #0b0d14; border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0 22px; box-shadow: 0 22px 44px rgba(0,0,0,.5); z-index: 99; }
.search-panel.open { display: block; }
.search-box { width: min(1280px, 92vw); margin: 0 auto; display: flex; align-items: center; gap: 12px; background: #161924; border: 1px solid rgba(255,255,255,.12); border-radius: 12px; padding: 0 16px; transition: border-color .2s; }
.search-box:focus-within { border-color: #7c3aed; }
.search-box .ic { width: 20px; height: 20px; stroke: #8b5cf6; flex: none; }
.search-box input { flex: 1; min-width: 0; background: transparent; border: 0; outline: none; color: #fff; font-size: 16px; padding: 14px 0; font-family: inherit; }
.search-box input::placeholder { color: #6b7088; }
.search-box input::-webkit-search-cancel-button { -webkit-appearance: none; }
.search-close { flex: none; background: transparent; border: 0; color: #8b8fa8; font-size: 26px; line-height: 1; cursor: pointer; padding: 0 6px; transition: color .2s; }
.search-close:hover { color: #fff; }
.search-results { width: min(1280px, 92vw); margin: 14px auto 0; max-height: calc(100vh - 210px); overflow-y: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.sr-item { display: block; background: #161924; border: 1px solid rgba(255,255,255,.08); border-radius: 10px; padding: 14px 16px; color: #e8eaf6; transition: border-color .2s, transform .2s, background .2s; }
.sr-item:hover { border-color: #7c3aed; background: #1c2030; transform: translateY(-2px); }
.sr-cat { font-size: 12px; color: #8b5cf6; letter-spacing: 1px; }
.sr-title { font-size: 15.5px; font-weight: 600; margin: 4px 0 3px; }
.sr-desc { font-size: 13px; color: #9aa0b8; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.search-empty { color: #8b8fa8; font-size: 14px; padding: 8px 2px; }

/* ---------- Hero（图片轮播） ---------- */
.hero { position: relative; min-height: 92vh; background: #0a0b12; display: flex; align-items: center; overflow: hidden; }
/* 轮播层：交叉淡入 + 缓慢放大（电影感），文字区左侧压暗保证可读性 */
.hero-slides { position: absolute; inset: 0; z-index: 0; }
.hero-slide { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0; transform: scale(1.06); transition: opacity 1s ease; pointer-events: none; }
.hero-slide.on { opacity: 1; transform: scale(1); transition: opacity 1s ease, transform 7.5s ease-out; pointer-events: auto; }
.hero-slide::after { content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(10,11,18,.94) 4%, rgba(10,11,18,.68) 40%, rgba(10,11,18,.28) 70%, rgba(10,11,18,.42) 100%),
    linear-gradient(180deg, rgba(10,11,18,.55) 0%, transparent 28%, transparent 74%, rgba(10,11,18,.55) 100%);
}
/* 光轨装饰 */
.hero .beam { position: absolute; height: 1.5px; width: 46%; right: -4%; top: 34%; transform: rotate(-14deg);
  background: linear-gradient(90deg, transparent, rgba(167,139,250,.85), transparent); filter: drop-shadow(0 0 8px rgba(139,92,246,.8)); }
.hero .beam.b2 { top: 44%; width: 34%; right: 10%; opacity: .6; }
.hero .beam.b3 { top: 26%; width: 26%; right: 20%; opacity: .4; }
.hero-in { position: relative; z-index: 2; width: min(1280px, 92vw); margin: 0 auto; padding: 150px 0 190px; color: #fff; }
.hero-tag { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; letter-spacing: 3px; color: #b7bdd4; border: 1px solid rgba(255,255,255,.22); padding: 7px 18px; border-radius: 999px; margin-bottom: 30px; }
.hero-tag i { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-3); box-shadow: 0 0 10px var(--brand-3); }
.hero h1 { font-size: clamp(40px, 5.2vw, 68px); font-weight: 800; letter-spacing: 4px; line-height: 1.22; }
.hero h1 .g { background: linear-gradient(92deg, #a78bfa, #6d8dff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { margin-top: 24px; font-size: 17px; color: #aab0c6; letter-spacing: 2px; line-height: 2; }
.hero-sub b { color: #e8eaf6; font-weight: 600; }
.hero-btns { margin-top: 42px; display: flex; gap: 18px; }
.btn { display: inline-flex; align-items: center; gap: 10px; font-size: 15.5px; padding: 14px 34px; border-radius: 999px; transition: transform .25s, box-shadow .25s; }
.btn-p { background: var(--grad); color: #fff; box-shadow: 0 10px 28px rgba(109, 40, 217, .45); }
.btn-p:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(109, 40, 217, .55); }
.btn-o { border: 1px solid rgba(255,255,255,.35); color: #e8eaf6; }
.btn-o:hover { border-color: #a78bfa; color: #c4b5fd; }
.hero-dots { position: absolute; left: 4vw; bottom: 150px; display: flex; gap: 9px; z-index: 3; }
.hero-dots i { width: 9px; height: 9px; border-radius: 999px; background: rgba(255,255,255,.30); cursor: pointer; transition: width .3s, background .3s, box-shadow .3s; }
.hero-dots i.on { width: 30px; background: var(--brand-3); box-shadow: 0 0 8px var(--brand-3); }
/* 轮播翻页按钮（右下角成组，避免压到左侧文案） */
.hero-nav { position: absolute; right: 4vw; bottom: 128px; z-index: 3; display: flex; gap: 12px; }
.hero-arrow { width: 52px; height: 52px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.25); background: rgba(10,11,18,.35); color: #e8eaf6;
  display: flex; align-items: center; justify-content: center; cursor: pointer; backdrop-filter: blur(6px);
  transition: background .25s, border-color .25s, transform .25s; }
.hero-arrow:hover { background: rgba(124,58,237,.5); border-color: #a78bfa; transform: translateY(-2px); }
@media (max-width: 900px) {
  .hero-nav { display: none; }
  .hero-dots { left: 50%; transform: translateX(-50%); bottom: 120px; }
}
/* 右下角斜切几何组（禾川签名元素） */
.hero-cut { position: absolute; right: 0; bottom: 0; z-index: 1; width: 320px; height: 320px; pointer-events: none; }
.hero-cut i { position: absolute; background: var(--grad); opacity: .92; }
.hero-cut i:nth-child(1) { right: -60px; bottom: -110px; width: 260px; height: 240px; transform: skewX(-24deg) rotate(0deg); border-radius: 18px; }
.hero-cut i:nth-child(2) { right: 120px; bottom: -160px; width: 130px; height: 200px; transform: skewX(-24deg); border-radius: 14px; opacity: .55; background: linear-gradient(180deg, #8b5cf6, #4f46e5); }
.hero-cut i:nth-child(3) { right: -30px; bottom: 120px; width: 70px; height: 110px; transform: skewX(-24deg); border-radius: 10px; opacity: .35; }

/* ---------- 悬浮快捷条 ---------- */
.quick { position: relative; z-index: 5; width: min(1180px, 92vw); margin: 0 auto; transform: translateY(-50%); background: #fff; border-radius: 16px; box-shadow: var(--shadow); display: grid; grid-template-columns: repeat(5, 1fr); }
.quick a { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 30px 10px; font-size: 15.5px; font-weight: 600; color: var(--ink); position: relative; transition: color .25s; }
.quick a + a::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); height: 34px; width: 1px; background: var(--line); }
.quick a svg { width: 26px; height: 26px; stroke: var(--brand); fill: none; stroke-width: 1.7; transition: transform .25s; }
.quick a:hover { color: var(--brand); }
.quick a:hover svg { transform: translateY(-3px) scale(1.1); }

/* ---------- 版块头（渐变眉题 + 标题 + 胶囊tab） ---------- */
section { padding: 96px 0; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 52px; }
.sec-eyebrow { font-size: 17px; font-weight: 700; letter-spacing: 2px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 10px; }
.sec-head h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; letter-spacing: 2px; }
.sec-head p { margin-top: 12px; color: var(--muted); font-size: 15px; letter-spacing: 1px; }
.tabs { display: flex; gap: 10px; flex-shrink: 0; }
.tabs button { border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 14px; padding: 9px 22px; border-radius: 999px; cursor: pointer; transition: all .25s; }
.tabs button.on { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 8px 20px rgba(109, 40, 217, .3); }
.tabs button:not(.on):hover { border-color: var(--brand-3); color: var(--brand); }

/* ---------- 产品卡片 ---------- */
.p-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.p-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; position: relative; transition: transform .3s, box-shadow .3s; }
.p-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .35s; }
.p-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.p-card:hover::before { transform: scaleX(1); }
.p-visual { height: 190px; background: linear-gradient(135deg, #f2f1fb, #e9ebf7); display: grid; place-items: center; position: relative; overflow: hidden; }
.p-visual svg { width: 84px; height: 84px; stroke: var(--brand); fill: none; stroke-width: 1.4; opacity: .9; }
.p-visual .p-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.p-card:hover .p-img { transform: scale(1.05); }
.p-badge { position: absolute; top: 14px; left: 14px; font-size: 12px; color: #fff; background: var(--grad); padding: 4px 12px; border-radius: 999px; letter-spacing: 1px; }
.p-body { padding: 24px 24px 26px; }
.p-tag { font-size: 12.5px; color: var(--brand); letter-spacing: 1px; margin-bottom: 8px; }
.p-body h3 { font-size: 18.5px; font-weight: 700; letter-spacing: .5px; }
.p-body p { margin: 10px 0 16px; color: var(--muted); font-size: 14px; min-height: 44px; }
.p-feats { display: flex; flex-direction: column; gap: 7px; margin-bottom: 20px; }
.p-feats li { font-size: 13.5px; color: var(--ink-2); display: flex; gap: 8px; align-items: baseline; }
.p-feats li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-3); flex-shrink: 0; transform: translateY(-2px); }
.p-more { font-size: 14px; font-weight: 600; color: var(--brand); display: inline-flex; align-items: center; gap: 6px; }
.p-more:hover { gap: 10px; } .p-more { transition: gap .25s; }

/* ---------- 解决方案（斜切装饰背景） ---------- */
.sol { background: var(--bg-gray); position: relative; overflow: hidden; }
.sol::before { content: ""; position: absolute; left: -60px; top: 60px; width: 380px; height: 380px; background: linear-gradient(135deg, rgba(124,58,237,.06), rgba(79,70,229,.05)); transform: skewX(-24deg); border-radius: 30px; }
.sol-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; position: relative; }
.sol-card { background: #fff; border-radius: var(--r); padding: 34px 24px 30px; text-align: center; border: 1px solid transparent; transition: all .3s; }
.sol-card:hover { border-color: #ddd6fe; box-shadow: var(--shadow); transform: translateY(-6px); }
.sol-ico { width: 66px; height: 66px; margin: 0 auto 18px; border-radius: 16px; background: linear-gradient(135deg, #f1ecfd, #e4e7fd); display: grid; place-items: center; }
.sol-ico svg { width: 32px; height: 32px; stroke: var(--brand); fill: none; stroke-width: 1.6; }
.sol-card h3 { font-size: 17px; font-weight: 700; }
.sol-card p { margin-top: 8px; font-size: 13.5px; color: var(--muted); }

/* ---------- 核心技术：深色渐变大横幅 ---------- */
.tech { background: var(--grad-d); color: #fff; position: relative; overflow: hidden; }
.tech::before { content: ""; position: absolute; right: -80px; top: -80px; width: 420px; height: 420px; background: rgba(255,255,255,.06); transform: skewX(-24deg); border-radius: 36px; }
.tech::after { content: ""; position: absolute; left: 6%; bottom: -120px; width: 260px; height: 260px; background: rgba(255,255,255,.045); transform: skewX(-24deg); border-radius: 28px; }
.tech .sec-eyebrow { background: linear-gradient(92deg, #c4b5fd, #93b4fd); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tech .sec-head p { color: rgba(255,255,255,.62); }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; position: relative; z-index: 2; }
.tech-card { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(8px); border-radius: var(--r); padding: 34px 26px; transition: all .3s; }
.tech-card:hover { background: rgba(255,255,255,.12); transform: translateY(-6px); }
.tech-num { font-size: 15px; font-weight: 800; letter-spacing: 2px; color: #c4b5fd; margin-bottom: 14px; }
.tech-card h3 { font-size: 18px; letter-spacing: 1px; margin-bottom: 8px; }
.tech-card .tl { font-size: 13px; color: #b9c2e8; margin-bottom: 16px; min-height: 40px; }
.tech-card ul { display: flex; flex-direction: column; gap: 8px; }
.tech-card li { font-size: 13.5px; color: rgba(255,255,255,.82); display: flex; gap: 8px; align-items: baseline; }
.tech-card li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: #a78bfa; flex-shrink: 0; transform: translateY(-2px); }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 60px; align-items: center; }
.about-txt p { color: var(--ink-2); font-size: 15px; margin-top: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.a-stat { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 30px 26px; position: relative; overflow: hidden; }
.a-stat::after { content: ""; position: absolute; right: -24px; bottom: -24px; width: 90px; height: 90px; background: linear-gradient(135deg, rgba(124,58,237,.09), rgba(79,70,229,.06)); transform: skewX(-24deg); border-radius: 12px; }
.a-stat b { font-size: 38px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.a-stat b i { font-style: normal; font-size: 20px; }
.a-stat span { display: block; margin-top: 6px; color: var(--muted); font-size: 14px; }

/* ---------- 应用领域 ---------- */
.apps { background: var(--bg-gray); }
.app-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.app-card { background: #fff; border-radius: var(--r); padding: 30px 20px; text-align: center; transition: all .3s; border: 1px solid transparent; }
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #ddd6fe; }
.app-card h3 { font-size: 16.5px; }
.app-card p { font-size: 13px; color: var(--muted); margin-top: 6px; }
.app-card .sol-ico { width: 58px; height: 58px; margin-bottom: 14px; }
.app-card .sol-ico svg { width: 28px; height: 28px; }

/* ---------- CTA 渐变横幅 ---------- */
.cta { padding: 0; }
.cta-band { background: var(--grad-d); border-radius: 20px; padding: 64px 70px; display: flex; align-items: center; justify-content: space-between; gap: 40px; color: #fff; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; right: -50px; top: -70px; width: 300px; height: 300px; background: rgba(255,255,255,.07); transform: skewX(-24deg); border-radius: 26px; }
.cta-band h2 { font-size: clamp(24px, 2.6vw, 32px); letter-spacing: 2px; position: relative; }
.cta-band p { margin-top: 10px; color: rgba(255,255,255,.68); letter-spacing: 1px; position: relative; }
.cta-band .btn { background: #fff; color: var(--brand); font-weight: 700; position: relative; }
.cta-band .btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.25); }

/* ---------- 页脚 ---------- */
footer { background: #0b0d14; color: #9aa0b5; margin-top: 96px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 50px; padding: 70px 0 50px; }
.foot-grid h4 { color: #fff; font-size: 15.5px; letter-spacing: 2px; margin-bottom: 20px; }
.foot-grid li { font-size: 14px; margin-bottom: 11px; }
.foot-grid a:hover { color: #c4b5fd; }
.foot-brand .brand { margin-bottom: 16px; }
.foot-brand p { font-size: 13.5px; line-height: 1.9; }
.foot-bar { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; font-size: 13px; display: flex; justify-content: space-between; gap: 20px; }
.foot-bar .g { background: linear-gradient(92deg, #a78bfa, #6d8dff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; font-weight: 700; letter-spacing: 1px; }

/* 备案号预留位：与版权行公司名并列同一行（未备案为虚线占位，填 SITE.icp.no 后自动变链接） */
.fb-left { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 16px; }
.foot-icp { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 13px; color: #7f859c; letter-spacing: 1px; }
.foot-icp a { transition: color .25s; }
.foot-icp a:hover { color: #c4b5fd; }
.foot-icp .ph { color: #6b7088; border-bottom: 1px dashed rgba(255,255,255,.22); padding-bottom: 2px; }

/* ---------- 入场动画 ---------- */
.rv { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.rv.show { opacity: 1; transform: none; }

/* ============================================================
   内页样式（禾川风）—— 全站 7 页共用
   ============================================================ */
.inner-page { padding-top: 74px; }

/* ---------- 内页顶部：深色渐变横幅 ---------- */
.page-hero { position: relative; background: var(--grad-d); color: #fff; overflow: hidden; padding: 82px 0 86px; }
.page-hero::before { content: ""; position: absolute; right: -70px; top: -90px; width: 380px; height: 380px; background: rgba(255,255,255,.07); transform: skewX(-24deg); border-radius: 34px; }
.page-hero::after { content: ""; position: absolute; left: 4%; bottom: -140px; width: 240px; height: 240px; background: rgba(255,255,255,.05); transform: skewX(-24deg); border-radius: 26px; }
.page-hero .wrap { position: relative; z-index: 2; }
.crumbs { font-size: 13.5px; color: rgba(255,255,255,.55); letter-spacing: 1px; margin-bottom: 16px; }
.crumbs a { color: rgba(255,255,255,.75); }
.crumbs a:hover { color: #c4b5fd; }
.crumbs span { margin: 0 8px; opacity: .5; }
.page-hero h1 { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; letter-spacing: 3px; }
.page-hero .lead { margin-top: 16px; font-size: 16px; color: rgba(255,255,255,.68); letter-spacing: 1.5px; max-width: 820px; line-height: 1.9; }
.page-hero .eyebrow { font-size: 14px; font-weight: 700; letter-spacing: 4px; color: #c4b5fd; margin-bottom: 12px; }

/* ---------- 产品页：分组 + 参数表 ---------- */
.p-group { scroll-margin-top: 110px; }
.p-group + .p-group { margin-top: 74px; }
.group-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 28px; padding-left: 16px; border-left: 4px solid var(--brand); }
.group-head h3 { font-size: 23px; font-weight: 800; letter-spacing: 2px; }
.group-head span { font-size: 14px; color: var(--muted); letter-spacing: 1px; }

.spec-toggle { margin-top: 18px; }
.spec-btn { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--brand); cursor: pointer; user-select: none; }
.spec-btn svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; transition: transform .3s; }
.p-card.open .spec-btn svg { transform: rotate(180deg); }
.spec-panel { display: none; margin-top: 18px; border-top: 1px dashed var(--line); padding-top: 16px; }
.p-card.open .spec-panel { display: block; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table th, .spec-table td { text-align: left; padding: 9px 10px; border-bottom: 1px solid #f1f2f8; vertical-align: top; }
.spec-table th { width: 38%; color: var(--muted); font-weight: 500; }
.spec-table td { color: var(--ink); }

/* ---------- 方案页：详解卡 ---------- */
.sol-det { display: grid; grid-template-columns: 300px 1fr; gap: 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: #fff; margin-bottom: 26px; transition: box-shadow .3s, transform .3s; }
.sol-det:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.sol-det-l { background: var(--grad-d); color: #fff; padding: 38px 32px; position: relative; overflow: hidden; }
.sol-det-l::before { content: ""; position: absolute; right: -50px; bottom: -60px; width: 180px; height: 180px; background: rgba(255,255,255,.07); transform: skewX(-24deg); border-radius: 20px; }
.sol-det-l .ico { width: 60px; height: 60px; border-radius: 15px; background: rgba(255,255,255,.13); display: grid; place-items: center; margin-bottom: 20px; position: relative; }
.sol-det-l .ico svg { width: 30px; height: 30px; stroke: #c4b5fd; fill: none; stroke-width: 1.6; }
.sol-det-l h3 { font-size: 21px; letter-spacing: 2px; position: relative; }
.sol-det-l .scene { margin-top: 10px; font-size: 13.5px; color: rgba(255,255,255,.62); line-height: 1.9; position: relative; }
.sol-det-r { padding: 34px 36px; }
.sol-det-r h5 { font-size: 14px; color: var(--brand); letter-spacing: 2px; margin: 0 0 12px; font-weight: 700; }
.sol-det-r h5 + * { margin-bottom: 20px; }
.sol-det-r ul { display: flex; flex-direction: column; gap: 9px; }
.sol-det-r li { font-size: 14px; color: var(--ink-2); display: flex; gap: 9px; align-items: baseline; }
.sol-det-r li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-3); flex-shrink: 0; transform: translateY(-2px); }
.sol-det-r p.plan { font-size: 14px; color: var(--ink-2); line-height: 2; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { font-size: 13px; padding: 6px 14px; border-radius: 999px; background: #f3f1fd; color: var(--brand); border: 1px solid #e4defa; }
.chips.g .chip { background: #eef7f0; color: #2c7a45; border-color: #d8ecdc; }

/* ---------- 技术页：详解卡 ---------- */
.tech-det { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 40px 38px; position: relative; overflow: hidden; }
.tech-det + .tech-det { margin-top: 24px; }
.tech-det::after { content: ""; position: absolute; right: -30px; top: -30px; width: 130px; height: 130px; background: linear-gradient(135deg, rgba(124,58,237,.08), rgba(79,70,229,.05)); transform: skewX(-24deg); border-radius: 18px; }
.tech-det-h { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; position: relative; }
.tech-det-n { width: 46px; height: 46px; flex-shrink: 0; border-radius: 12px; background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 16px; }
.tech-det h3 { font-size: 20px; letter-spacing: 1.5px; }
.tech-det .tagline { font-size: 14.5px; color: var(--brand); letter-spacing: 1px; margin-bottom: 14px; }
.tech-det .detail { font-size: 14.5px; color: var(--ink-2); line-height: 2; margin-bottom: 18px; }
.tech-det ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 26px; }
.tech-det li { font-size: 14px; color: var(--ink-2); display: flex; gap: 9px; align-items: baseline; }
.tech-det li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-3); flex-shrink: 0; transform: translateY(-2px); }

/* 总线拓扑图容器 */
.topo-box { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 26px; margin-top: 34px; }
.topo-box svg { width: 100%; max-width: 780px; height: auto; display: block; margin: 0 auto; }

/* ---------- 关于页：时间线 + 价值观 ---------- */
.timeline { position: relative; padding-left: 34px; margin-top: 10px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--brand-3), #cbd0e4); }
.tl-item { position: relative; padding-bottom: 30px; }
.tl-item::before { content: ""; position: absolute; left: -30px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--brand); }
.tl-year { font-size: 16px; font-weight: 800; color: var(--brand); letter-spacing: 1px; }
.tl-item h4 { font-size: 16.5px; margin: 4px 0 6px; }
.tl-item p { font-size: 14px; color: var(--muted); line-height: 1.9; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 34px 28px; position: relative; overflow: hidden; transition: all .3s; }
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #ddd6fe; }
.value-card::after { content: ""; position: absolute; right: -26px; bottom: -26px; width: 96px; height: 96px; background: linear-gradient(135deg, rgba(124,58,237,.09), rgba(79,70,229,.06)); transform: skewX(-24deg); border-radius: 14px; }
.value-card h4 { font-size: 18px; letter-spacing: 1.5px; position: relative; }
.value-card p { margin-top: 10px; font-size: 14px; color: var(--muted); line-height: 1.9; position: relative; }

/* ---------- 服务支持页 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.svc-card { background: #fff; border-radius: var(--r); padding: 32px 22px; text-align: center; border: 1px solid var(--line); transition: all .3s; }
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #ddd6fe; }
.svc-card h4 { font-size: 16.5px; margin: 16px 0 8px; }
.svc-card p { font-size: 13.5px; color: var(--muted); line-height: 1.9; }
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.flow-item { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 32px 22px; }
.flow-item::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 3px; background: var(--grad); border-radius: var(--r) var(--r) 0 0; }
.flow-n { font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
.flow-item h4 { font-size: 17px; margin: 12px 0 8px; letter-spacing: 1px; }
.flow-item p { font-size: 13.5px; color: var(--muted); line-height: 1.9; }

/* FAQ 手风琴 */
.faq-list { max-width: 900px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--r); margin-bottom: 14px; overflow: hidden; transition: box-shadow .3s; }
.faq-item.open { box-shadow: var(--shadow); border-color: #ddd6fe; }
.faq-q { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 26px; cursor: pointer; font-size: 15.5px; font-weight: 600; user-select: none; }
.faq-q i { width: 22px; height: 22px; flex-shrink: 0; border-radius: 50%; background: #f3f1fd; display: grid; place-items: center; color: var(--brand); font-style: normal; font-size: 15px; transition: transform .3s; }
.faq-item.open .faq-q i { transform: rotate(45deg); background: var(--grad); color: #fff; }
.faq-a { display: none; padding: 0 26px 22px; font-size: 14.5px; color: var(--ink-2); line-height: 2; }
.faq-item.open .faq-a { display: block; }

/* 下载区 */
.dl-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.dl-item { display: flex; align-items: center; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px 26px; transition: all .3s; }
.dl-item:hover { border-color: #ddd6fe; box-shadow: var(--shadow); transform: translateY(-3px); }
.dl-ico { width: 46px; height: 46px; flex-shrink: 0; border-radius: 11px; background: linear-gradient(135deg, #f1ecfd, #e4e7fd); display: grid; place-items: center; }
.dl-ico svg { width: 22px; height: 22px; stroke: var(--brand); fill: none; stroke-width: 1.6; }
.dl-txt b { display: block; font-size: 15.5px; font-weight: 600; }
.dl-txt span { font-size: 13px; color: var(--muted); }
.dl-go { margin-left: auto; font-size: 13.5px; color: var(--brand); font-weight: 600; flex-shrink: 0; }

/* ---------- 联系页 ---------- */
.ct-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ct-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 34px 28px; position: relative; overflow: hidden; }
.ct-card::after { content: ""; position: absolute; right: -24px; bottom: -24px; width: 90px; height: 90px; background: linear-gradient(135deg, rgba(124,58,237,.08), rgba(79,70,229,.05)); transform: skewX(-24deg); border-radius: 13px; }
.ct-card h4 { font-size: 17px; letter-spacing: 1.5px; margin-bottom: 14px; position: relative; }
.ct-card p, .ct-card a { font-size: 14.5px; color: var(--ink-2); line-height: 2; position: relative; display: block; }
.ct-card a.tel { font-size: 22px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.ct-card a.tel:hover { opacity: .8; }
.ct-note { margin-top: 26px; text-align: center; font-size: 14px; color: var(--muted); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .menu { display: none; }
  .hamburger { display: flex; }
  .nav-search { width: 46px; height: 46px; border-radius: 10px; }
  .nav-in { gap: 16px; }
  /* 汉堡展开后的全宽下拉菜单 */
  .menu.open {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 74px; left: 0; right: 0;
    background: #0b0d14; border-top: 1px solid rgba(255,255,255,.08);
    padding: 6px 0; box-shadow: 0 20px 40px rgba(0,0,0,.45);
    max-height: calc(100vh - 74px); overflow-y: auto;
  }
  .menu.open a { font-size: 16px; padding: 14px 24px; color: #cfd3e0; border-bottom: 1px solid rgba(255,255,255,.05); }
  .menu.open a.on::after { display: none; }
  .menu.open a.on { color: #fff; background: rgba(124,58,237,.16); }
  .quick { grid-template-columns: repeat(3, 1fr); row-gap: 0; }
  .quick a:nth-child(4)::before, .quick a:nth-child(1)::before { display: none; }
  .p-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .sec-head { flex-direction: column; align-items: flex-start; }
  .cta-band { flex-direction: column; text-align: center; padding: 50px 30px; }
  .foot-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-det { grid-template-columns: 1fr; }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .ct-grid { grid-template-columns: 1fr; }
  .dl-list { grid-template-columns: 1fr; }
  .tech-det ul { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .quick { width: 94vw; border-radius: 14px; }
  .quick a { flex-direction: column; gap: 7px; padding: 18px 6px 16px; font-size: 14px; white-space: nowrap; }
  .quick a svg { width: 23px; height: 23px; }
  .quick a + a::before { height: 46px; }
  .tabs { flex-wrap: wrap; }
  .tabs button { white-space: nowrap; }
  /* 产品卡片在手机上改为单列，避免内容过窄、阅读不适 */
  .p-grid { grid-template-columns: 1fr; }
  .p-body { padding: 22px 22px 24px; }
  /* 核心技术卡片在手机上改为单列，避免 01/02 并列导致内容压缩 */
  .tech-grid { grid-template-columns: 1fr; }
  .tech-card { padding: 28px 24px; }
  .tech-card .tl { min-height: auto; }
  /* 解决方案 / 应用领域 / 服务支持 / 流程步骤在手机上改为单列，避免两列内容过窄 */
  .sol-grid, .app-grid, .svc-grid, .flow { grid-template-columns: 1fr; }
  /* 内页大标题在手机上缩小，避免标题过长显得突兀 */
  .page-hero { padding: 64px 0 66px; }
  .page-hero h1 { font-size: clamp(22px, 6.2vw, 27px); letter-spacing: 1px; line-height: 1.35; }
  .page-hero .lead { font-size: 14.5px; letter-spacing: .5px; line-height: 1.85; }
  /* 页脚版权行在手机上纵向排列；缩小字号让备案号与公司名保持同行 */
  .foot-bar { flex-direction: column; align-items: flex-start; gap: 10px; font-size: 12px; }
  .fb-left { gap: 4px 8px; }
  .foot-icp { font-size: 12px; gap: 12px; letter-spacing: .5px; }
}