/* =========================================================
   山东云朗网络科技有限公司 官网全局样式
   YunLangIDC Official Site - Global Style
   ========================================================= */
:root {
  --navy-950: #060f26;
  --navy-900: #0a1a3f;
  --navy-800: #0f2b5c;
  --navy-700: #16376e;
  --blue-600: #1458f0;
  --blue-500: #2b6fff;
  --blue-400: #4d8bff;
  --cyan: #22d3ee;
  --cyan-soft: #67e8f9;
  --green: #0ecb81;
  --amber: #f6b21a;
  --bg: #ffffff;
  --bg-soft: #f3f6fc;
  --bg-deep: #0b1c40;
  --line: #e4eaf5;
  --line-dark: rgba(255, 255, 255, 0.12);
  --text: #1f2b45;
  --text-2: #55617a;
  --muted: #8492ab;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 6px 18px rgba(20, 40, 90, 0.06);
  --shadow-md: 0 14px 40px rgba(16, 45, 110, 0.1);
  --shadow-lg: 0 24px 60px rgba(10, 30, 80, 0.16);
  --grad-blue: linear-gradient(120deg, #1458f0, #2b6fff 55%, #22d3ee 130%);
  --grad-text: linear-gradient(90deg, #2b6fff, #22d3ee);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
ul { list-style: none; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
.container { width: min(1200px, 92%); margin: 0 auto; }
.text-center { text-align: center; }
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- 通用标题 ---------------- */
.sec { padding: 88px 0; }
.sec.soft { background: var(--bg-soft); }
.sec.dark {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(43,111,255,.28), transparent 60%),
    radial-gradient(700px 380px at -10% 110%, rgba(34,211,238,.16), transparent 60%),
    var(--bg-deep);
  color: #fff;
}
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 54px; }
.sec-head .tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: 2px; color: var(--blue-500);
  font-weight: 600; margin-bottom: 14px;
}
.sec-head .tag::before, .sec-head .tag::after {
  content: ""; width: 26px; height: 1px; background: currentColor; opacity: .7;
}
.sec.dark .sec-head .tag { color: var(--cyan-soft); }
.sec-head h2 { font-size: 32px; line-height: 1.35; font-weight: 700; color: var(--navy-900); letter-spacing: 1px; }
.sec.dark .sec-head h2 { color: #fff; }
.sec-head h2 em { font-style: normal; color: var(--blue-500); }
.sec.dark .sec-head h2 em { color: var(--cyan-soft); }
.sec-head p { color: var(--text-2); margin-top: 14px; font-size: 15px; }
.sec.dark .sec-head p { color: rgba(255,255,255,.72); }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 0; transition: all .3s ease; white-space: nowrap;
}
.btn-primary { background: var(--grad-blue); color: #fff; box-shadow: 0 10px 26px rgba(43,111,255,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(43,111,255,.45); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.35); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,.2); border-color: rgba(255,255,255,.7); }
.btn-light { background: #fff; color: var(--navy-800); box-shadow: var(--shadow-sm); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-soft { background: rgba(43,111,255,.1); color: var(--blue-600); border: 1px solid rgba(43,111,255,.28); }
.btn-soft:hover { background: var(--blue-500); color: #fff; }
.btn-lg { padding: 15px 38px; font-size: 16px; }

/* =========================================================
   顶部导航
   ========================================================= */
.header { position: fixed; inset: 0 0 auto 0; z-index: 999; transition: all .3s ease; }
.header .topbar {
  height: 36px; background: rgba(6, 15, 38, .55); backdrop-filter: blur(6px);
  color: rgba(255,255,255,.72); font-size: 12.5px; display: flex; align-items: center;
  border-bottom: 1px solid rgba(255,255,255,.08); transition: all .3s ease;
}
.header .topbar .container { display: flex; justify-content: space-between; align-items: center; }
.header .topbar a { color: rgba(255,255,255,.72); transition: color .2s; }
.header .topbar a:hover { color: var(--cyan-soft); }
.header .topbar .group { display: flex; gap: 20px; }
.header .topbar .dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); margin-right: 6px; box-shadow: 0 0 0 3px rgba(14,203,129,.2); }
.header .topbar .tel { font-weight: 700; color: #fff; }
.header .navbar { background: rgba(255,255,255,.9); backdrop-filter: blur(14px); transition: all .3s ease; }
.header.is-scrolled .topbar { height: 0; overflow: hidden; opacity: 0; }
.header.is-scrolled .navbar { background: rgba(255,255,255,.97); box-shadow: 0 8px 30px rgba(10,30,80,.08); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo .mark {
  width: 42px; height: 42px; border-radius: 11px; flex: none; background: var(--grad-blue);
  display: grid; place-items: center; box-shadow: 0 8px 20px rgba(43,111,255,.35);
}
.logo .mark svg { width: 24px; height: 24px; }
.logo .name { line-height: 1.2; }
.logo .name b { display: block; font-size: 18px; color: var(--navy-900); letter-spacing: 1px; }
.logo .name span { font-size: 11px; color: var(--muted); letter-spacing: 3px; }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
  display: flex; align-items: center; gap: 5px; padding: 10px 15px;
  color: var(--text); font-weight: 500; font-size: 15px; border-radius: 8px; transition: all .25s;
}
.nav-menu > li > a .arrow { width: 10px; height: 10px; transition: transform .25s; opacity: .6; }
.nav-menu > li.has-sub:hover > a .arrow, .nav-menu > li.has-sub.open > a .arrow { transform: rotate(180deg); }
.nav-menu > li > a:hover, .nav-menu > li.active > a { color: var(--blue-600); background: rgba(43,111,255,.08); }
.submenu {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  background: #fff; border-radius: 14px; box-shadow: var(--shadow-lg); padding: 10px; min-width: 228px;
  opacity: 0; visibility: hidden; transition: all .28s ease; border: 1px solid var(--line);
}
.submenu::before { content: ""; position: absolute; top: -10px; left: 0; right: 0; height: 12px; }
.nav-menu > li.has-sub:hover .submenu, .nav-menu > li.has-sub.open .submenu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.submenu a { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 10px; transition: all .2s; }
.submenu a:hover { background: rgba(43,111,255,.08); }
.submenu a .si { width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center; background: rgba(43,111,255,.1); flex: none; }
.submenu a .si svg { width: 19px; height: 19px; }
.submenu a b { display: block; font-size: 14px; color: var(--text); font-weight: 600; }
.submenu a i { font-style: normal; font-size: 12px; color: var(--muted); }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-cta .consult { font-size: 13px; color: var(--text-2); text-align: right; }
.nav-cta .consult b { color: var(--blue-600); font-size: 17px; display: block; line-height: 1.2; }

/* 汉堡 */
.burger { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--line); background: #fff; position: relative; }
.burger span { position: absolute; left: 11px; right: 11px; height: 2px; border-radius: 2px; background: var(--navy-800); transition: all .3s; }
.burger span:nth-child(1) { top: 13px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 27px; }
body.menu-open .burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
body.menu-open .burger span:nth-child(2) { opacity: 0; }
body.menu-open .burger span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* 移动导航抽屉 */
.mobile-nav { position: fixed; inset: 0; z-index: 998; background: rgba(6,15,38,.5); opacity: 0; visibility: hidden; transition: all .3s; backdrop-filter: blur(3px); }
body.menu-open .mobile-nav { opacity: 1; visibility: visible; }
.mobile-nav .drawer {
  position: absolute; top: 0; bottom: 0; left: 0; width: min(320px, 84%); background: #fff;
  padding: 118px 22px 30px; overflow-y: auto; transform: translateX(-102%); transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
body.menu-open .mobile-nav .drawer { transform: translateX(0); }
.mobile-nav .drawer .m-brand { display: flex; align-items: center; gap: 12px; padding: 0 8px 16px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.mobile-nav .drawer .m-brand .mark { width: 36px; height: 36px; border-radius: 10px; background: var(--grad-blue); display: grid; place-items: center; box-shadow: 0 6px 16px rgba(43,111,255,.3); }
.mobile-nav .drawer .m-brand .mark .lg { font-size: 18px; font-weight: 800; color: #fff; }
.mobile-nav .drawer .m-brand .m-brand-t { font-size: 17px; font-weight: 700; color: var(--navy-900); letter-spacing: 1px; }
.mobile-nav .drawer > a { display: block; padding: 13px 8px; font-size: 16px; font-weight: 600; color: var(--text); border-bottom: 1px solid var(--line); }
.mobile-nav .drawer .sub-tit { font-size: 13px; color: var(--muted); padding: 14px 8px 6px; letter-spacing: 1px; }
.mobile-nav .drawer .sub-link a { display: block; padding: 9px 12px 9px 16px; font-size: 14px; color: var(--text-2); border-radius: 8px; }
.mobile-nav .drawer .sub-link a:hover { background: var(--bg-soft); color: var(--blue-600); }
.mobile-nav .drawer .m-cta { margin-top: 22px; display: flex; flex-direction: column; gap: 12px; }
.mobile-nav .drawer .m-tel { text-align: center; color: var(--blue-600); font-size: 20px; font-weight: 800; letter-spacing: 1px; }

/* =========================================================
   首页 Hero
   ========================================================= */
.hero {
  position: relative; overflow: hidden; padding: 180px 0 130px; color: #fff;
  background:
    radial-gradient(1100px 560px at 78% -10%, rgba(34,211,238,.22), transparent 62%),
    radial-gradient(900px 500px at -5% 20%, rgba(43,111,255,.4), transparent 58%),
    linear-gradient(150deg, #071136 0%, #0a1a3f 45%, #0b2c66 100%);
}
.hero .grid-bg {
  position: absolute; inset: 0; opacity: .35;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse at 50% 0, #000 30%, transparent 75%);
}
.hero .glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.hero .glow.g1 { width: 420px; height: 420px; background: rgba(34,211,238,.35); top: -120px; right: 8%; animation: float 9s ease-in-out infinite; }
.hero .glow.g2 { width: 380px; height: 380px; background: rgba(43,111,255,.45); bottom: -140px; left: -80px; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-22px); } }

.hero .container { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.hero-copy .badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.22); border-radius: 999px; padding: 7px 16px;
  font-size: 13px; color: var(--cyan-soft); margin-bottom: 22px; backdrop-filter: blur(4px);
}
.hero-copy .badge .live { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 1.8s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(14,203,129,.5);} 70% { box-shadow: 0 0 0 8px rgba(14,203,129,0);} 100% { box-shadow: 0 0 0 0 rgba(14,203,129,0);} }
.hero-copy h1 { font-size: 46px; line-height: 1.28; font-weight: 800; letter-spacing: 1px; }
.hero-copy h1 .line2 { color: transparent; background: linear-gradient(92deg, #6ea8ff, #4df0ff); -webkit-background-clip: text; background-clip: text; }
.hero-copy p.sub { color: rgba(255,255,255,.8); margin: 20px 0 32px; font-size: 16px; max-width: 560px; }
.hero-copy .btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-feat { display: flex; gap: 34px; margin-top: 44px; flex-wrap: wrap; }
.hero-feat .hf b { display: block; font-size: 26px; font-weight: 800; color: #fff; }
.hero-feat .hf b i { font-style: normal; color: var(--cyan); font-size: 15px; margin-left: 2px; }
.hero-feat .hf span { font-size: 13px; color: rgba(255,255,255,.6); }

/* Hero 图 */
.hero-visual { position: relative; }
.hero-rack {
  position: relative; border-radius: 18px; padding: 22px;
  background: linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.03));
  border: 1px solid rgba(255,255,255,.16); backdrop-filter: blur(8px);
  box-shadow: 0 30px 80px rgba(0,10,40,.5); animation: floatY 6s ease-in-out infinite;
}
@keyframes floatY { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-14px);} }
.rack-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 14px; }
.rack-top b { font-size: 13px; letter-spacing: 2px; color: rgba(255,255,255,.9); }
.rack-top span { font-size: 11px; color: var(--cyan-soft); }
.rack-serv {
  flex: 1; border-radius: 10px; padding: 12px 14px; margin-bottom: 12px; position: relative; overflow: hidden;
  background: linear-gradient(140deg, rgba(13,30,70,.9), rgba(16,40,95,.9));
  border: 1px solid rgba(255,255,255,.1);
}
.rack-serv::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--cyan); opacity: .85; }
.rack-serv.s2::before { background: var(--blue-400); }
.rack-serv.s3::before { background: #8b5cf6; }
.rack-serv .rname { display: flex; justify-content: space-between; font-size: 12px; color: rgba(255,255,255,.85); font-weight: 600; }
.rack-serv .rname i { font-style: normal; color: var(--green); font-size: 10px; display: flex; align-items: center; gap: 4px; }
.rack-serv .rname i::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.rack-serv .rmeta { display: flex; gap: 16px; margin-top: 8px; font-size: 11px; color: rgba(255,255,255,.5); }
.rack-serv .rmeta b { color: rgba(255,255,255,.85); font-weight: 600; }
.float-card {
  position: absolute; background: rgba(255,255,255,.95); border-radius: 12px; padding: 12px 16px;
  box-shadow: 0 18px 44px rgba(0,10,40,.35); display: flex; align-items: center; gap: 10px; z-index: 3;
}
.float-card .fc-ic { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; flex: none; }
.float-card .fc-ic svg { width: 20px; height: 20px; }
.float-card b { display: block; font-size: 14px; color: var(--navy-900); line-height: 1.3; }
.float-card span { font-size: 11px; color: var(--muted); }
.fc1 { top: -30px; left: -42px; animation: float 7s ease-in-out infinite; }
.fc2 { bottom: 40px; right: -50px; animation: float 8s ease-in-out 1.2s infinite; }
.fc3 { bottom: -34px; left: 16%; animation: float 7.5s ease-in-out .6s infinite; }

/* 滚动提示 */
.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.5); font-size: 12px; letter-spacing: 3px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.scroll-hint::after { content: ""; width: 1px; height: 34px; background: linear-gradient(rgba(255,255,255,.6), transparent); animation: drop 1.8s infinite; }
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; opacity: 0;} 40% { opacity: 1;} 100% { transform: scaleY(1); transform-origin: top; opacity: 0;} }

/* 快捷导航条 */
.quick-strip { margin-top: -52px; position: relative; z-index: 20; }
.quick-strip .qs-card {
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid var(--line);
}
.qs-item { display: flex; align-items: center; gap: 16px; padding: 24px 28px; transition: all .25s; position: relative; }
.qs-item + .qs-item::before { content: ""; position: absolute; left: 0; top: 22%; height: 56%; width: 1px; background: var(--line); }
.qs-item:hover { background: linear-gradient(140deg, rgba(43,111,255,.06), rgba(34,211,238,.05)); }
.qs-item .qi { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; flex: none; background: rgba(43,111,255,.1); color: var(--blue-600); transition: all .25s; }
.qs-item .qi svg { width: 26px; height: 26px; }
.qs-item:hover .qi { background: var(--grad-blue); color: #fff; transform: scale(1.06); }
.qs-item b { font-size: 16px; color: var(--navy-900); }
.qs-item span { font-size: 12.5px; color: var(--muted); display: block; }

/* =========================================================
   卡片区通用
   ========================================================= */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

/* 产品卡片 */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.prod-card {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: all .35s cubic-bezier(.2,.7,.3,1); overflow: hidden;
}
.prod-card::after {
  content: ""; position: absolute; inset: auto -30% -70% -30%; height: 90%;
  background: radial-gradient(closest-side, rgba(43,111,255,.12), transparent);
  opacity: 0; transition: opacity .35s;
}
.prod-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
.prod-card:hover::after { opacity: 1; }
.prod-card .hot {
  position: absolute; top: 14px; right: -34px; transform: rotate(45deg);
  background: linear-gradient(90deg, #ff6b35, #ff3d4e); color: #fff; font-size: 11px;
  padding: 4px 36px; letter-spacing: 1px; font-weight: 600;
}
.prod-card .p-ic {
  width: 62px; height: 62px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 20px;
  background: linear-gradient(140deg, rgba(43,111,255,.14), rgba(34,211,238,.12)); color: var(--blue-600);
}
.prod-card .p-ic svg { width: 30px; height: 30px; }
.prod-card h3 { font-size: 19px; color: var(--navy-900); position: relative; }
.prod-card p.desc { font-size: 13.5px; color: var(--text-2); margin: 10px 0 16px; min-height: 62px; }
.prod-card ul.feat { position: relative; }
.prod-card ul.feat li { font-size: 13px; color: var(--text-2); padding: 5px 0 5px 22px; position: relative; }
.prod-card ul.feat li::before { content: ""; position: absolute; left: 2px; top: 12px; width: 8px; height: 8px; border-radius: 3px; background: var(--grad-blue); }
.prod-card .link-more { position: relative; display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-weight: 600; font-size: 14px; color: var(--blue-600); }
.prod-card .link-more svg { width: 15px; height: 15px; transition: transform .25s; }
.prod-card:hover .link-more svg { transform: translateX(5px); }

/* 特性卡片 */
.feat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 28px; transition: all .3s; }
.feat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.feat-card .fi {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; color: #fff;
  background: var(--grad-blue); margin-bottom: 18px; box-shadow: 0 8px 20px rgba(43,111,255,.3);
}
.feat-card .fi svg { width: 26px; height: 26px; }
.feat-card h3 { font-size: 18px; color: var(--navy-900); margin-bottom: 10px; }
.feat-card p { font-size: 13.5px; color: var(--text-2); }

/* 数字统计 */
.stat-band {
  background:
    linear-gradient(rgba(6,15,38,.9), rgba(6,15,38,.92)),
    radial-gradient(700px 300px at 20% 0, rgba(34,211,238,.25), transparent 60%);
  padding: 30px 40px; border-radius: var(--radius-lg);
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; position: relative; overflow: hidden;
}
.stat-band::after { content: ""; position: absolute; top: -60px; right: 10%; width: 220px; height: 220px; background: rgba(43,111,255,.4); filter: blur(80px); border-radius: 50%; }
.stat-band .st { text-align: center; position: relative; z-index: 2; }
.stat-band .st + .st { border-left: 1px solid rgba(255,255,255,.12); }
.stat-band .st b { display: block; font-size: 36px; font-weight: 800; color: #fff; }
.stat-band .st b i { font-style: normal; font-size: 18px; color: var(--cyan); margin-left: 2px; }
.stat-band .st span { font-size: 13px; color: rgba(255,255,255,.65); }

/* =========================================================
   数据中心展示
   ========================================================= */
.cap-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; margin: 20px 0 28px; }
.cap-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 14.5px; color: var(--text-2); }
.cap-list li svg { width: 20px; height: 20px; flex: none; margin-top: 2px; color: var(--blue-500); }
.cap-list li b { color: var(--text); }

/* 流程 */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: flow; }
.flow-step {
  position: relative; background: #fff; border-radius: var(--radius); border: 1px solid var(--line);
  padding: 30px 24px 26px; text-align: center; transition: all .3s;
}
.flow-step:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.flow-step::before { counter-increment: flow; content: "0" counter(flow); font-size: 44px; font-weight: 800; line-height: 1; color: rgba(43,111,255,.14); }
.flow-step .fic { margin: 6px auto 12px; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 50%; background: rgba(43,111,255,.1); color: var(--blue-600); }
.flow-step .fic svg { width: 22px; height: 22px; }
.flow-step h3 { font-size: 16px; color: var(--navy-900); }
.flow-step p { font-size: 13px; color: var(--text-2); margin-top: 8px; }
.flow-step:not(:last-child)::after {
  content: ""; position: absolute; top: 45%; right: -18px; width: 18px; height: 2px;
  background: repeating-linear-gradient(90deg, var(--blue-400) 0 4px, transparent 4px 8px);
}

/* 案例 */
.case-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 28px; transition: all .3s; position: relative; overflow: hidden; }
.case-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad-blue); transform: scaleX(0); transform-origin: left; transition: transform .35s; }
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.case-card:hover::before { transform: scaleX(1); }
.case-card .ind { font-size: 13px; color: var(--blue-600); background: rgba(43,111,255,.08); padding: 4px 12px; border-radius: 999px; display: inline-block; }
.case-card h3 { margin: 14px 0 8px; font-size: 17px; color: var(--navy-900); }
.case-card p { font-size: 13.5px; color: var(--text-2); }
.case-card .metrics { display: flex; gap: 20px; margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); }
.case-card .metrics .m b { font-size: 19px; font-weight: 800; color: var(--blue-600); }
.case-card .metrics .m span { font-size: 12px; color: var(--muted); }

/* 品牌墙 / 资质 */
.brand-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.brand-wall .bw {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 16px 26px;
  font-weight: 700; color: #55617a; font-size: 17px; letter-spacing: 1px; transition: all .25s; user-select: none;
}
.brand-wall .bw:hover { border-color: var(--blue-400); color: var(--blue-600); box-shadow: var(--shadow-sm); }
.qual-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-top: 26px; }
.qual-item { display: flex; align-items: center; gap: 10px; background: rgba(43,111,255,.08); color: var(--blue-600); border: 1px dashed rgba(43,111,255,.35); padding: 10px 18px; border-radius: 999px; font-size: 14px; font-weight: 600; }
.qual-item svg { width: 17px; height: 17px; }

/* CTA */
.cta-band {
  border-radius: var(--radius-lg); overflow: hidden; position: relative; color: #fff;
  background: linear-gradient(120deg, #0a1a3f, #0d2f6e 55%, #0b5aa0);
  padding: 66px 70px; display: flex; align-items: center; justify-content: space-between; gap: 40px;
}
.cta-band::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 36px 36px; opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse at 0 100%, #000, transparent 70%);
          mask-image: radial-gradient(ellipse at 0 100%, #000, transparent 70%);
}
.cta-band h2 { font-size: 30px; position: relative; z-index: 2; }
.cta-band p { color: rgba(255,255,255,.75); margin-top: 10px; position: relative; z-index: 2; }
.cta-band .btns { display: flex; gap: 16px; position: relative; z-index: 2; flex: none; }
.cta-band .btns .tel { font-size: 26px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 10px; }
.cta-band .btns .tel svg { width: 22px; height: 22px; color: var(--cyan-soft); }
/* =========================================================
   页脚
   ========================================================= */
.footer { background: var(--navy-950); color: rgba(255,255,255,.72); }
.footer-main { padding: 66px 0 40px; display: grid; grid-template-columns: 1.4fr repeat(3, .8fr); gap: 46px; }
.footer .f-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.footer .f-logo .mark { width: 42px; height: 42px; border-radius: 11px; background: var(--grad-blue); display: grid; place-items: center; flex: none; }
.footer .f-logo .mark svg { width: 24px; height: 24px; }
.footer .f-logo b { color: #fff; font-size: 19px; }
.footer .f-logo span { display: block; font-size: 11px; letter-spacing: 3px; color: rgba(255,255,255,.45); }
.footer .f-about { font-size: 13.5px; color: rgba(255,255,255,.6); max-width: 330px; }
.footer .f-contact { margin-top: 20px; display: grid; gap: 12px; }
.footer .f-contact div { display: flex; align-items: center; gap: 10px; font-size: 13.5px; }
.footer .f-contact svg { width: 17px; height: 17px; color: var(--cyan); flex: none; }
.footer .f-contact b { color: rgba(255,255,255,.9); }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 28px; height: 2px; background: var(--grad-blue); border-radius: 2px; }
.footer .f-link { display: grid; gap: 11px; }
.footer .f-link a { font-size: 13.5px; color: rgba(255,255,255,.6); transition: all .2s; display: inline-flex; align-items: center; gap: 8px; }
.footer .f-link a::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: rgba(255,255,255,.28); transition: all .2s; }
.footer .f-link a:hover { color: var(--cyan-soft); padding-left: 4px; }
.footer .f-link a:hover::before { background: var(--cyan); }
.footer .f-codes { display: flex; gap: 16px; }
.footer .qr { width: 96px; text-align: center; }
.footer .qr .qrbox { width: 96px; height: 96px; border-radius: 10px; background: #fff; display: grid; place-items: center; color: var(--navy-800); }
.footer .qr .qrbox svg { width: 74px; height: 74px; }
.footer .qr span { font-size: 11.5px; color: rgba(255,255,255,.5); margin-top: 6px; display: block; }
.footer .f-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,.5); }
.footer .f-bottom a { color: rgba(255,255,255,.6); }
.footer .f-bottom a:hover { color: var(--cyan-soft); }
.footer .f-bottom .beian a { display: inline-flex; align-items: center; gap: 6px; }

/* =========================================================
   内页通用：Banner
   ========================================================= */
.page-hero { position: relative; padding: 170px 0 76px; overflow: hidden; color: #fff; }
.page-hero .ph-bg { position: absolute; inset: 0;
  background:
    radial-gradient(900px 460px at 80% -20%, rgba(34,211,238,.24), transparent 60%),
    radial-gradient(700px 420px at 0% 120%, rgba(43,111,255,.42), transparent 55%),
    linear-gradient(150deg, #071136, #0a1a3f 55%, #0b2f70);
}
.page-hero .ph-bg .lines { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 46px 46px; -webkit-mask-image: radial-gradient(ellipse at 60% 0, #000, transparent 75%); mask-image: radial-gradient(ellipse at 60% 0, #000, transparent 75%); }
.page-hero .ph-bg .orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5; }
.page-hero .ph-bg .orb.o1 { width: 300px; height: 300px; background: rgba(34,211,238,.4); right: 6%; top: -80px; animation: float 8s infinite; }
.page-hero .container { position: relative; z-index: 2; text-align: center; }
.page-hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 2px; }
.page-hero h1 em { font-style: normal; color: transparent; background: linear-gradient(90deg, #7db4ff, #4df0ff); -webkit-background-clip: text; background-clip: text; }
.page-hero p { color: rgba(255,255,255,.78); max-width: 640px; margin: 16px auto 0; font-size: 15px; }
.crumb { margin-top: 20px; display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16); padding: 6px 16px; border-radius: 999px; font-size: 12.5px; color: rgba(255,255,255,.7); backdrop-filter: blur(4px); }
.crumb a:hover { color: var(--cyan-soft); }
.crumb .sep { opacity: .5; }

/* 子导航条（内页锚点） */
.sub-nav { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 70px; z-index: 50; box-shadow: 0 4px 14px rgba(10,30,80,.04); }
.sub-nav .container { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.sub-nav .container::-webkit-scrollbar { display: none; }
.sub-nav a { padding: 16px 18px; font-size: 14.5px; color: var(--text-2); border-bottom: 2px solid transparent; font-weight: 500; white-space: nowrap; transition: all .2s; }
.sub-nav a:hover { color: var(--blue-600); }
.sub-nav a.on { color: var(--blue-600); border-bottom-color: var(--blue-500); }

/* 表格 */
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.tbl { width: 100%; border-collapse: collapse; min-width: 760px; }
.tbl th, .tbl td { padding: 15px 18px; text-align: left; font-size: 14px; }
.tbl thead th { background: var(--navy-900); color: #fff; font-weight: 600; letter-spacing: .5px; }
.tbl tbody th { background: var(--bg-soft); color: var(--navy-800); font-weight: 600; width: 150px; }
.tbl tbody tr:nth-child(even) td { background: #fafcff; }
.tbl tbody tr { border-top: 1px solid var(--line); }
.tbl td b { color: var(--blue-600); }
.tbl .tag-hot { background: linear-gradient(90deg,#ff6b35,#ff3d4e); color: #fff; font-size: 11px; padding: 2px 10px; border-radius: 999px; margin-left: 6px; vertical-align: 2px; font-weight: 600; }

/* 方案卡 */
.plan-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.plan-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; position: relative; transition: all .3s; display: flex; flex-direction: column; }
.plan-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.plan-card.hot { border-color: transparent; box-shadow: 0 0 0 2px var(--blue-500), var(--shadow-md); }
.plan-card .pl-tag { position: absolute; top: 0; right: 22px; transform: translateY(-50%); background: var(--grad-blue); color: #fff; font-size: 11px; padding: 4px 12px; border-radius: 999px; font-weight: 600; letter-spacing: 1px; }
.plan-card h3 { font-size: 17px; color: var(--navy-900); }
.plan-card .pl-sub { font-size: 12px; color: var(--muted); margin-top: 4px; }
.plan-card .price { margin: 18px 0 6px; display: flex; align-items: baseline; gap: 4px; }
.plan-card .price .cur { color: var(--blue-600); font-size: 18px; font-weight: 700; }
.plan-card .price .num { font-size: 38px; font-weight: 800; color: var(--blue-600); line-height: 1; }
.plan-card .price .unit { color: var(--muted); font-size: 13px; }
.plan-card .old { color: var(--muted); font-size: 12.5px; text-decoration: line-through; }
.plan-card ul { margin: 18px 0 22px; flex: 1; }
.plan-card ul li { font-size: 13.5px; color: var(--text-2); padding: 7px 0 7px 24px; position: relative; border-bottom: 1px dashed var(--line); }
.plan-card ul li:last-child { border-bottom: 0; }
.plan-card ul li::before { content: "✓"; position: absolute; left: 0; top: 7px; color: var(--green); font-weight: 700; }
.plan-card .btn { width: 100%; }

/* 新闻 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: all .3s; display: flex; flex-direction: column; }
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.news-card .thumb { height: 168px; position: relative; overflow: hidden; }
.news-card .thumb .cat { position: absolute; top: 14px; left: 14px; z-index: 2; background: rgba(6,15,38,.55); backdrop-filter: blur(6px); color: #fff; font-size: 11.5px; padding: 3px 12px; border-radius: 999px; border: 1px solid rgba(255,255,255,.25); }
.news-card .body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.news-card .body h3 { font-size: 16.5px; color: var(--navy-900); line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 52px; }
.news-card .body p { font-size: 13px; color: var(--text-2); margin-top: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .meta { margin-top: auto; padding-top: 14px; display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; color: var(--muted); }
.news-card .meta a { color: var(--blue-600); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.thumb.g1 { background: linear-gradient(135deg,#0b2c66,#1458f0 60%,#22d3ee); }
.thumb.g2 { background: linear-gradient(135deg,#0a1a3f,#2b6fff 55%,#6ea8ff); }
.thumb.g3 { background: linear-gradient(135deg,#131a4d,#4d1e8f 55%,#a855f7); }
.thumb.g4 { background: linear-gradient(135deg,#07263a,#0e7490 55%,#22d3ee); }
.thumb.g5 { background: linear-gradient(135deg,#3a1c06,#b45309 55%,#f6b21a); }
.thumb.g6 { background: linear-gradient(135deg,#052e2b,#0f766e 55%,#2dd4bf); }
.thumb svg { position: absolute; right: -18px; bottom: -26px; width: 150px; height: 150px; opacity: .3; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 44px; }
.pagination a { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 10px; color: var(--text-2); font-size: 14px; transition: all .2s; background: #fff; }
.pagination a:hover, .pagination a.on { background: var(--grad-blue); color: #fff; border-color: transparent; }

/* 资讯筛选 */
.cat-tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.cat-tabs a { padding: 9px 22px; border-radius: 999px; border: 1px solid var(--line); font-size: 14px; color: var(--text-2); background: #fff; transition: all .2s; font-weight: 500; }
.cat-tabs a:hover { color: var(--blue-600); border-color: var(--blue-400); }
.cat-tabs a.on { background: var(--grad-blue); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(43,111,255,.28); }

/* 文章详情 */
.article { max-width: 860px; margin: 0 auto; }
.article .a-head { text-align: center; padding-bottom: 30px; border-bottom: 1px solid var(--line); margin-bottom: 34px; }
.article .a-head h1 { font-size: 30px; line-height: 1.5; color: var(--navy-900); }
.article .a-meta { display: flex; justify-content: center; gap: 26px; color: var(--muted); font-size: 13px; margin-top: 18px; flex-wrap: wrap; }
.article .a-meta svg { width: 15px; height: 15px; vertical-align: -2px; margin-right: 5px; }
.article .a-body { color: var(--text-2); font-size: 15.5px; line-height: 2; }
.article .a-body h2 { font-size: 21px; color: var(--navy-900); margin: 34px 0 14px; line-height: 1.5; }
.article .a-body h2::before { content: ""; display: inline-block; width: 5px; height: 18px; background: var(--grad-blue); border-radius: 3px; margin-right: 10px; vertical-align: -2px; }
.article .a-body p { margin-bottom: 18px; }
.article .a-body .quote { border-left: 4px solid var(--blue-400); background: var(--bg-soft); padding: 16px 20px; border-radius: 0 10px 10px 0; margin: 22px 0; color: var(--text); }
.article .a-body .stat-inline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 26px 0; }
.article .a-body .stat-inline div { background: var(--bg-soft); border-radius: 12px; padding: 20px 12px; text-align: center; }
.article .a-body .stat-inline b { display: block; font-size: 24px; color: var(--blue-600); }
.article .a-body .stat-inline span { font-size: 12.5px; color: var(--muted); }
.a-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }
.a-nav a { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; transition: all .25s; background: #fff; }
.a-nav a:hover { border-color: var(--blue-400); box-shadow: var(--shadow-sm); }
.a-nav a span { font-size: 12px; color: var(--muted); display: block; margin-bottom: 4px; }
.a-nav a b { font-size: 14px; color: var(--text); font-weight: 600; }
.a-nav a.prev b { display: inline-flex; align-items: center; gap: 6px; }
.a-nav a.prev b::before { content: "←"; }
.a-nav a.next { text-align: right; }
.a-nav a.next b { display: inline-flex; align-items: center; gap: 6px; }
.a-nav a.next b::after { content: "→"; }

/* 时间轴 */
.milestone { position: relative; max-width: 900px; margin: 0 auto; }
.mile { position: relative; padding: 0 0 40px 70px; border-left: 2px solid var(--line); }
.mile::before {
  content: ""; position: absolute; left: -11px; top: 4px; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 5px solid var(--blue-500); box-shadow: 0 0 0 5px rgba(43,111,255,.15);
}
.mile .yr { font-size: 13px; color: var(--blue-600); font-weight: 700; letter-spacing: 2px; }
.mile h3 { font-size: 18px; color: var(--navy-900); margin: 6px 0 8px; }
.mile p { font-size: 14px; color: var(--text-2); }
.mile:last-child { border-left-color: transparent; padding-bottom: 0; }

/* 资质卡 */
.cert-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cert-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; text-align: center; transition: all .3s; }
.cert-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.cert-card .ci { width: 60px; height: 60px; margin: 0 auto 14px; border-radius: 16px; display: grid; place-items: center; background: rgba(43,111,255,.1); color: var(--blue-600); }
.cert-card .ci svg { width: 30px; height: 30px; }
.cert-card h3 { font-size: 16px; color: var(--navy-900); }
.cert-card p { font-size: 13px; color: var(--text-2); margin-top: 6px; }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 30px; align-items: stretch; }
.contact-info { background: var(--navy-900); border-radius: var(--radius); color: #fff; padding: 40px 38px; position: relative; overflow: hidden; }
.contact-info::after { content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%; background: rgba(34,211,238,.18); filter: blur(70px); bottom: -80px; right: -60px; }
.contact-info h3 { font-size: 24px; position: relative; z-index: 2; }
.contact-info > p { color: rgba(255,255,255,.68); margin-top: 8px; position: relative; z-index: 2; }
.contact-info .c-items { margin-top: 30px; display: grid; gap: 20px; position: relative; z-index: 2; }
.contact-info .c-item { display: flex; gap: 16px; }
.contact-info .c-item .ci { width: 46px; height: 46px; border-radius: 12px; flex: none; display: grid; place-items: center; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); }
.contact-info .c-item .ci svg { width: 21px; height: 21px; color: var(--cyan-soft); }
.contact-info .c-item b { display: block; font-size: 15px; margin-bottom: 2px; }
.contact-info .c-item span { font-size: 13px; color: rgba(255,255,255,.62); }
.contact-info .c-item .big { font-size: 24px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 38px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 20px; color: var(--navy-900); }
.form-card .f-sub { color: var(--muted); font-size: 13.5px; margin: 6px 0 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-item { margin-bottom: 16px; }
.form-item label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 7px; }
.form-item label i { color: #ff4d4f; font-style: normal; }
.form-item input, .form-item select, .form-item textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px;
  font-size: 14px; font-family: inherit; color: var(--text); background: var(--bg-soft); outline: none; transition: all .2s;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { border-color: var(--blue-400); background: #fff; box-shadow: 0 0 0 4px rgba(43,111,255,.1); }
.form-item textarea { min-height: 110px; resize: vertical; }
.form-item select { appearance: none; background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238492ab' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; }
.form-success { display: none; align-items: center; gap: 12px; background: rgba(14,203,129,.1); border: 1px solid rgba(14,203,129,.4); color: #0a9d63; border-radius: 10px; padding: 12px 16px; font-size: 14px; margin-top: 8px; }
.form-success.show { display: flex; }
.form-success svg { width: 20px; height: 20px; flex: none; }

/* 图文交替 */
.adv-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.adv-row .art h3 { font-size: 28px; color: var(--navy-900); line-height: 1.4; }
.adv-row .art h3 em { font-style: normal; color: var(--blue-500); }
.adv-row .art p { color: var(--text-2); margin: 16px 0 0; font-size: 14.5px; }
.adv-row .art ul { margin-top: 20px; }
.adv-row .art ul li { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; font-size: 14px; color: var(--text-2); }
.adv-row .art ul li svg { width: 20px; height: 20px; color: var(--blue-500); flex: none; margin-top: 3px; }

/* 双栏卖点 */
.dual-col { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.dual-col.reverse .col-art { order: 2; }
.dual-col .art-block h3 { font-size: 30px; color: var(--navy-900); line-height: 1.4; }
.dual-col .art-block h3 em { font-style: normal; color: var(--blue-500); }
.dual-col .art-block > p { color: var(--text-2); margin-top: 16px; }
.dual-col .points { margin-top: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; }
.dual-col .points li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text-2); }
.dual-col .points li svg { width: 18px; height: 18px; color: var(--green); flex: none; margin-top: 4px; }
.dual-col .points li b { color: var(--text); font-weight: 600; }

/* 艺术图框 */
.art-frame { border-radius: var(--radius-lg); position: relative; overflow: hidden; min-height: 380px; }
.art-frame.f-blue { background: linear-gradient(160deg, #0a1a3f, #0b3d8f 70%, #1458f0); box-shadow: 0 26px 60px rgba(10,30,80,.28); }
.art-frame .svg-core { position: absolute; inset: 0; display: grid; place-items: center; padding: 30px; }
.art-frame .svg-core svg { width: min(88%, 460px); height: auto; filter: drop-shadow(0 20px 30px rgba(0,0,0,.25)); }
.art-frame .af-badge { position: absolute; background: rgba(255,255,255,.96); border-radius: 12px; padding: 10px 16px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 10px; z-index: 2; }
.art-frame .af-badge b { display: block; font-size: 13px; color: var(--navy-900); line-height: 1.3; }
.art-frame .af-badge span { font-size: 11px; color: var(--muted); }
.art-frame .af-badge .mini-ic { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: rgba(43,111,255,.12); color: var(--blue-600); flex: none; }
.art-frame .af-badge .mini-ic svg { width: 17px; height: 17px; }
.ab-1 { top: 26px; left: 26px; }
.ab-2 { bottom: 30px; right: 26px; }

/* 服务保障条 */
.guar-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.guar-card { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 26px 24px; display: flex; gap: 16px; align-items: center; transition: all .3s; }
.guar-card:hover { box-shadow: var(--shadow-md); transform: translateY(-5px); }
.guar-card .gi { width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center; background: rgba(43,111,255,.1); color: var(--blue-600); flex: none; }
.guar-card .gi svg { width: 25px; height: 25px; }
.guar-card b { display: block; font-size: 15.5px; color: var(--navy-900); }
.guar-card span { font-size: 12.5px; color: var(--muted); }

/* 说明条 */
.note-box { display: flex; gap: 14px; background: rgba(43,111,255,.05); border: 1px solid rgba(43,111,255,.18); border-radius: var(--radius); padding: 18px 22px; }
.note-box svg { width: 22px; height: 22px; flex: none; color: var(--blue-500); margin-top: 3px; }
.note-box p { font-size: 13.5px; color: var(--text-2); }
.note-box p b { color: var(--navy-800); }

/* 数据中心大图卡 */
.visual-card { border-radius: var(--radius-lg); overflow: hidden; position: relative; min-height: 460px; box-shadow: var(--shadow-lg); }
.vc-inner { position: absolute; inset: 0; display: grid; place-items: center; }
.vc-inner svg.art { width: min(92%, 520px); height: auto; filter: drop-shadow(0 24px 34px rgba(0,10,40,.35)); }
.vc-badge { position: absolute; display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-md); border-radius: 12px; padding: 12px 16px; z-index: 3; }
.vc-badge b { display: block; font-size: 14px; color: var(--navy-900); line-height: 1.3; }
.vc-badge span { font-size: 11px; color: var(--muted); }
.vc-badge svg { flex: none; }

/* 动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }

/* 返回顶部 */
.to-top { position: fixed; right: 26px; bottom: 26px; z-index: 90; width: 46px; height: 46px; border-radius: 50%; background: var(--grad-blue); color: #fff; border: 0; display: grid; place-items: center; box-shadow: 0 12px 28px rgba(20,88,240,.4); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .3s; }
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top svg { width: 18px; height: 18px; }

/* 附加小工具样式 */
.logo .mark .lg, .footer .f-logo .mark .lg { font-size: 21px; font-weight: 800; color: #fff; line-height: 1; }
.header .topbar a svg { width: 13px; height: 13px; vertical-align: -2px; margin-right: 5px; }
.header .topbar .tel svg { color: var(--cyan-soft); }
section[id], div[id] { scroll-margin-top: 130px; }
.btn svg { width: 16px; height: 16px; }
.hero-copy .btn svg, .cta-band .btn svg { width: 18px; height: 18px; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .product-grid, .grid-4, .guar-band { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .flow-step:not(:last-child)::after { display: none; }
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero { padding-bottom: 100px; }
  .stat-band { grid-template-columns: repeat(2, 1fr); }
  .stat-band .st:nth-child(3), .stat-band .st:nth-child(n+4) { border-left: 0; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .cta-band { flex-direction: column; text-align: center; padding: 46px 30px; }
  .adv-row, .dual-col, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .dual-col.reverse .col-art { order: 0; }
  .news-grid, .case-list, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .quick-strip .qs-card { grid-template-columns: repeat(2, 1fr); }
  .qs-item + .qs-item::before { display: none; }
  .plan-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .sec { padding: 60px 0; }
  .sec-head h2 { font-size: 24px; }
  .navbar .container { height: 60px; }
  .logo .mark { width: 36px; height: 36px; }
  .logo .name b { font-size: 16px; }
  .logo .name span { display: none; }
  .nav-menu, .nav-cta .consult { display: none; }
  .burger { display: block; }
  .sub-nav { top: 60px; }
  .page-hero { padding: 130px 0 56px; }
  .page-hero h1 { font-size: 28px; }
  .hero { padding: 140px 0 80px; }
  .hero-copy h1 { font-size: 30px; }
  .hero-copy .btns .btn { padding: 11px 20px; font-size: 14px; }
  .quick-strip .qs-card { grid-template-columns: 1fr; }
  .product-grid, .grid-4, .grid-3, .grid-2, .guar-band, .news-grid, .case-list, .plan-grid, .cert-wall, .flow { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: 1fr; }
  .stat-band .st { padding: 8px 0; border-left: 0 !important; border-bottom: 1px solid rgba(255,255,255,.12); }
  .stat-band .st:last-child { border-bottom: 0; }
  .cap-list { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 34px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-info, .form-card { padding: 28px 22px; }
  .cta-band h2 { font-size: 23px; }
  .float-card { display: none; }
  .hero-feat { gap: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}