/* ============================================================================
   星辉雨官网 v3 · 基础设计系统
   ----------------------------------------------------------------------------
   01 设计变量   02 重置与排版   03 按钮与标签   04 布局与区块   05 导航与抽屉
   06 页脚       07 通用组件     08 动效与可访问性  09 响应式
   首页专属样式见 home.css；二级页样式见 services.css / cases.css / trust.css / diagnosis.css
   ========================================================================== */

/* ── 01 设计变量 ─────────────────────────────────────────── */
:root{
  /* 品牌色 */
  --brand:#2E7BD6;
  --brand-600:#2468C0;
  --brand-700:#1B5399;
  --brand-050:#EDF4FE;
  --brand-100:#D8E9FC;
  --brand-200:#BBD7F8;
  /* 中性色 */
  --navy:#0A1A2E;
  --navy-800:#102A47;
  --ink:#0E1B2C;
  --body:#39485B;
  --slate:#5C6A7C;
  --muted:#8593A5;
  --line:#E3E8EF;
  --line-soft:#EDF1F6;
  --soft:#F5F8FC;
  --white:#ffffff;
  /* 功能色 */
  --accent:#F2743B;
  --accent-050:#FFF1E8;
  --green:#12A66A;
  --green-050:#E8F7F0;
  --red:#D64545;
  /* 圆角 / 阴影 */
  --r-xs:8px;
  --r-sm:12px;
  --r:16px;
  --r-lg:22px;
  --r-xl:28px;
  --shadow-xs:0 1px 2px rgba(16,24,40,.05);
  --shadow-sm:0 4px 14px -6px rgba(16,24,40,.12);
  --shadow:0 18px 40px -24px rgba(16,24,40,.30);
  --shadow-lg:0 44px 90px -44px rgba(16,24,40,.48);
  /* 布局 */
  --max:1208px;
  --pad:clamp(20px,4vw,32px);
  --nav-h:76px;
  --sec-y:clamp(64px,7.6vw,112px);
  /* 字体 */
  --font:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"SF Pro Display","Helvetica Neue",Arial,system-ui,sans-serif;
  /* 动效 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --dur:.32s;
}

/* ── 02 重置与排版 ───────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.72;
  color:var(--body);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body.nav-open,
body.drawer-open,
body.modal-open{overflow:hidden}
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4,h5{color:var(--ink);font-weight:800;line-height:1.24;letter-spacing:-.02em}
h1{font-size:clamp(36px,4.4vw,60px);line-height:1.12;letter-spacing:-.035em}
h2{font-size:clamp(27px,3vw,42px);letter-spacing:-.03em}
h3{font-size:clamp(18px,1.6vw,22px)}
strong,b{color:var(--ink);font-weight:700}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:3px solid rgba(46,123,214,.42);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--soft)}
::-webkit-scrollbar-thumb{background:#C4CFDD;border:2px solid var(--soft);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--brand)}
.ic{width:1.25em;height:1.25em;flex:none;display:inline-block;vertical-align:-.18em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:fixed;left:-9999px;top:12px;z-index:400;padding:12px 18px;border-radius:10px;background:var(--brand);color:#fff;font-weight:700}
.skip:focus{left:14px}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.18em;
  text-transform:uppercase;color:var(--brand);line-height:1.4;
}
.eyebrow.light{color:rgba(255,255,255,.62)}
.sub{font-size:clamp(14.5px,1.05vw,17px);line-height:1.78;color:var(--slate);max-width:46em}
.sec-head-light h2{color:#fff}
.sec-head-light .sub{color:rgba(255,255,255,.72)}
.sec-head-light .eyebrow{color:var(--brand-200)}
.sec-head-light .sec-num{color:rgba(255,255,255,.4)}

/* ── 03 按钮与标签 ───────────────────────────────────────── */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:52px;padding:0 26px;border-radius:var(--r-sm);border:1.5px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap;cursor:pointer;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),
             border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn .ic{width:18px;height:18px;transition:transform var(--dur) var(--ease)}
.btn:active{transform:translateY(0) scale(.985)}
.btn-primary{
  background:linear-gradient(135deg,#3C8AE0,#2E7BD6 55%,#276CC1);
  color:#fff;box-shadow:0 12px 26px -14px rgba(46,123,214,.85),inset 0 1px 0 rgba(255,255,255,.18);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 34px -14px rgba(46,123,214,.9);color:#fff}
.btn-primary:hover .ic{transform:translateX(3px)}
.btn-secondary{background:var(--navy);color:#fff;box-shadow:0 10px 24px -16px rgba(10,26,46,.8)}
.btn-secondary:hover{background:var(--navy-800);transform:translateY(-2px);color:#fff}
.btn-secondary:hover .ic{transform:translateX(3px)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-xs)}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand-200);background:var(--brand-050);transform:translateY(-2px)}
.btn-ghost:hover .ic{transform:translateX(3px)}
.btn-white{background:#fff;color:var(--navy);box-shadow:0 16px 30px -18px rgba(0,0,0,.5)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 22px 40px -18px rgba(0,0,0,.55);color:var(--brand-700)}
.btn-white:hover .ic{transform:translateX(3px)}
.btn-outline{background:rgba(255,255,255,.04);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px);color:#fff}
.btn-link{
  height:auto;padding:2px 0;border-radius:0;background:none;color:var(--brand);
  font-weight:700;border:0;gap:6px;
}
.btn-link:hover{color:var(--brand-700)}
.btn-link:hover .ic{transform:translateX(3px)}
.btn-sm{height:44px;padding:0 18px;font-size:14px;border-radius:10px;gap:7px}
.btn-sm .ic{width:16px;height:16px}
.btn-lg{height:56px;padding:0 30px;font-size:16px;border-radius:14px}
.btn-xl{height:60px;padding:0 34px;font-size:16.5px;border-radius:14px}
.btn-block{display:flex;width:100%}
.btn[disabled],.btn.is-loading{opacity:.7;cursor:wait;pointer-events:none}
.btn .spin{width:17px;height:17px;border-radius:50%;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;animation:spin .7s linear infinite;display:none}
.btn.is-loading .spin{display:inline-block}
.btn.is-loading .ic{display:none}
@keyframes spin{to{transform:rotate(360deg)}}

.tag{
  display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;
  font-size:11.5px;font-weight:800;letter-spacing:.04em;background:var(--brand-050);color:var(--brand-700);
}
.tag-accent{background:var(--accent-050);color:#B54A17}
.tag-green{background:var(--green-050);color:#0B7A4B}
.tag-light{background:rgba(255,255,255,.12);color:#fff}
.pill{
  display:inline-flex;align-items:center;gap:9px;align-self:flex-start;
  padding:8px 16px;border-radius:999px;background:var(--brand-050);color:var(--brand-700);
  border:1px solid var(--brand-100);font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(46,123,214,.16);flex:none;animation:dotPulse 2.4s ease-in-out infinite}
@keyframes dotPulse{0%,100%{box-shadow:0 0 0 3px rgba(46,123,214,.14)}50%{box-shadow:0 0 0 6px rgba(46,123,214,.06)}}

/* ── 04 布局与区块 ───────────────────────────────────────── */
.sec{padding:var(--sec-y) 0;position:relative}
.sec-soft{background:var(--soft)}
.sec-dark{background:linear-gradient(150deg,#081626,#0D2743 60%,#0A1A2E);color:rgba(255,255,255,.78)}
.sec-tight{padding:clamp(40px,4vw,64px) 0}
.sec-head{display:flex;flex-direction:column;gap:14px;margin-bottom:clamp(34px,4.4vw,60px);max-width:840px}
.sec-head.center{align-items:center;text-align:center;margin-inline:auto}
.sec-kicker{display:flex;align-items:center;gap:12px}
.sec-head.center .sec-kicker{justify-content:center}
.sec-kicker::after{content:"";width:clamp(28px,4vw,52px);height:1px;background:linear-gradient(90deg,var(--brand),rgba(46,123,214,0));margin-left:2px}
.sec-num{font-family:var(--font-num);font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.08em;opacity:.75}
.sec-head h2{margin-top:2px}
.sec-head.center .sub{margin-inline:auto}
.sec-head .title-line{display:block}
.sec-more{display:flex;justify-content:center;margin-top:clamp(28px,3vw,44px)}
.sec-note{font-size:12.5px;color:var(--muted);line-height:1.7}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(18px,2.4vw,32px)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2vw,26px)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,1.8vw,22px)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4.4vw,72px);align-items:center}
.split-aside{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(28px,4vw,64px);align-items:start}

/* 通用卡片 */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(22px,2.4vw,30px);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
a.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-200)}
.card-ico{
  display:grid;place-items:center;width:48px;height:48px;border-radius:14px;
  background:var(--brand-050);color:var(--brand);margin-bottom:16px;
}
.card-ico .ic{width:24px;height:24px}
.card h3{margin-bottom:8px}
.card p{font-size:14.5px;line-height:1.75;color:var(--slate)}
.card-num{font-family:var(--font-num);font-size:12px;font-weight:800;color:var(--muted);letter-spacing:.06em}

/* 功能清单 */
.checks{display:flex;flex-direction:column;gap:12px}
.checks li{display:flex;gap:11px;align-items:flex-start;font-size:15px;line-height:1.7;color:var(--body)}
.checks .ic{width:19px;height:19px;color:var(--green);margin-top:3px}
.checks b{font-weight:700}

/* 页面 Hero（二级页） */
.page-hero{
  position:relative;overflow:hidden;color:rgba(255,255,255,.78);
  padding:calc(var(--nav-h) + clamp(40px,5.4vw,76px)) 0 clamp(48px,6vw,84px);
  background:
    radial-gradient(900px 420px at 82% 0%,rgba(46,123,214,.28),transparent 62%),
    radial-gradient(600px 320px at 4% 100%,rgba(46,123,214,.12),transparent 60%),
    linear-gradient(150deg,#081626,#0C2340 55%,#0A1A2E);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:26px 26px;mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 78%);
}
.page-hero .wrap{position:relative;z-index:1}
.page-hero .breadcrumb{position:relative;margin-bottom:clamp(22px,3vw,34px)}
.ph-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);gap:clamp(24px,4vw,64px);align-items:end}
.ph-main h1{color:#fff;margin:12px 0 0;max-width:16em}
.ph-main .eyebrow{color:var(--brand-200)}
.ph-sub{font-size:clamp(15px,1.15vw,18px);line-height:1.8;color:rgba(255,255,255,.7);margin-top:18px;max-width:40em}
.ph-act{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.ph-chips{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:26px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.ph-chips li{display:flex;align-items:center;gap:7px;font-size:13px;color:rgba(255,255,255,.72)}
.ph-chips .ic{width:16px;height:16px;color:#5DD39E}
.ph-aside{display:flex;flex-direction:column;gap:14px}
.ph-card{
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-lg);padding:22px;backdrop-filter:blur(6px);
}
.ph-card .k{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--brand-200);text-transform:uppercase}
.ph-card b{display:block;color:#fff;font-size:17px;margin-top:8px}
.ph-card p{font-size:13px;line-height:1.7;color:rgba(255,255,255,.6);margin-top:6px}

/* 面包屑 */
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.5)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"";width:5px;height:5px;border-top:1px solid currentColor;border-right:1px solid currentColor;transform:rotate(45deg);opacity:.6}
.breadcrumb a:hover{color:#fff}
.breadcrumb [aria-current]{color:rgba(255,255,255,.82)}
.breadcrumb-on-light ol{color:var(--muted)}
.breadcrumb-on-light [aria-current]{color:var(--body)}

/* 吸顶子导航（服务/案例详情页） */
.subnav{
  position:sticky;top:calc(var(--nav-h) - 1px);z-index:60;
  background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.subnav-inner{display:flex;align-items:center;gap:clamp(14px,2.4vw,30px);overflow-x:auto;scrollbar-width:none}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav-inner>a{font-size:13.5px;font-weight:600;color:var(--slate);padding:15px 0;white-space:nowrap;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}
.subnav-inner>a:hover,.subnav-inner>a.active{color:var(--brand);border-bottom-color:var(--brand)}
.subnav .sn-cta{margin-left:auto;flex:none;padding:15px 0;border-bottom:0}
.subnav .sn-cta .btn{color:#fff;padding:0 18px;border-bottom:0}
.subnav .sn-cta .btn:hover{color:#fff}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(720px 360px at 82% 10%,rgba(46,123,214,.34),transparent 62%),
    linear-gradient(140deg,#0A1A2E,#113255 60%,#0C2340);
  padding:clamp(56px,6.6vw,96px) 0;
}
.cta-band::before{
  content:"";position:absolute;right:-6%;top:-40%;width:44%;aspect-ratio:1;border-radius:50%;
  border:1px solid rgba(255,255,255,.08);
}
.cta-inner{display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(28px,4vw,72px);align-items:center;position:relative}
.cta-txt h2{color:#fff;margin-top:12px;max-width:15em}
.cta-txt p{color:rgba(255,255,255,.68);font-size:15px;line-height:1.8;margin-top:14px;max-width:34em}
.cta-act{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.cta-act .btn{width:100%;max-width:340px}
.cta-note{display:flex;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.55)}
.cta-note .ic{width:16px;height:16px;color:rgba(255,255,255,.4)}

/* 数据条 */
.statband{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.stat{padding:clamp(18px,2.2vw,26px);border-left:1px solid var(--line-soft)}
.stat:first-child{border-left:0}
.stat b{display:block;font-family:var(--font-num);font-size:clamp(28px,3vw,38px);font-weight:800;line-height:1;color:var(--ink);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.stat b small{font-size:.46em;font-weight:800;color:var(--brand);margin-left:1px}
.stat span{display:block;font-size:12.5px;color:var(--slate);margin-top:8px}
.statband-dark{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);box-shadow:none}
.statband-dark .stat{border-color:rgba(255,255,255,.1)}
.statband-dark .stat b{color:#fff}
.statband-dark .stat span{color:rgba(255,255,255,.6)}

/* 平台条 */
.platform-strip{display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line-soft)}
.ps-label{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--muted);text-transform:uppercase}
.ps-list{display:flex;flex-wrap:wrap;gap:10px 22px}
.ps-list span{font-size:13.5px;font-weight:600;color:var(--slate);opacity:.85}
.ps-list span::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--brand-200);margin-right:8px;vertical-align:2px}

/* 表单 */
.lead-form{
  display:flex;flex-direction:column;gap:15px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:clamp(22px,2.8vw,34px);box-shadow:var(--shadow);
}
.lead-form .f-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.f-field{display:flex;flex-direction:column;gap:7px}
.f-field>span{font-size:12.5px;font-weight:700;color:var(--slate)}
.f-field>span i{font-style:normal;color:var(--red);margin-left:2px}
.f-field>span em{font-style:normal;font-weight:600;color:var(--muted);margin-left:4px;font-size:11.5px}
.f-field input,.f-field select,.f-field textarea{
  width:100%;padding:12px 14px;background:var(--soft);border:1.5px solid transparent;border-radius:10px;
  font-size:14.5px;color:var(--ink);transition:.2s;appearance:none;
}
.f-field textarea{resize:vertical;min-height:84px;line-height:1.6}
.f-field input::placeholder,.f-field textarea::placeholder{color:#9AA6B6}
.f-field select{
  cursor:pointer;padding-right:38px;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235C6A7C' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;background-size:18px;
}
.f-field input:focus,.f-field select:focus,.f-field textarea:focus{
  outline:none;background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(46,123,214,.13);
}
.f-field input.err,.f-field textarea.err{border-color:var(--red);background:#FFF7F7}
.f-consent{font-size:12.5px;color:var(--slate);line-height:1.6}
.f-consent label{display:flex;gap:9px;align-items:flex-start;cursor:pointer}
.f-consent input{margin:3px 0 0;flex:none;width:15px;height:15px;accent-color:var(--brand)}
.f-consent a{color:var(--brand);font-weight:700}
.f-consent.err{color:var(--red)}
.f-note{display:flex;gap:8px;align-items:flex-start;font-size:12px;line-height:1.7;color:var(--slate);margin:0}
.f-note .ic{width:15px;height:15px;color:var(--green);margin-top:2px}
.f-note a{color:var(--brand);font-weight:700}
.f-hp{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;opacity:0;pointer-events:none}
.f-done{display:flex;gap:14px;align-items:flex-start;background:var(--green-050);border:1px solid #B9E8D2;border-radius:14px;padding:18px}
.f-done[hidden]{display:none}
.f-done-ico{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--green);color:#fff;flex:none}
.f-done p{font-size:13px;color:#0B6B45;line-height:1.7;margin-top:4px}
.f-done a{color:#0B6B45;font-weight:700}

/* FAQ */
.faq{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;
  padding:clamp(17px,2vw,23px) 4px;text-align:left;font-size:clamp(15px,1.2vw,17px);
  font-weight:700;color:var(--ink);letter-spacing:-.01em;transition:color .2s,padding-left .24s;
}
.faq-q:hover{color:var(--brand);padding-left:8px}
.faq-q i{position:relative;width:24px;height:24px;flex:none;border-radius:50%;background:var(--brand-050);transition:background .25s}
.faq-q i::before,.faq-q i::after{
  content:"";position:absolute;left:50%;top:50%;width:10px;height:2px;border-radius:2px;
  background:var(--brand);transform:translate(-50%,-50%);transition:transform .3s var(--ease);
}
.faq-q i::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-q[aria-expanded="true"]{color:var(--brand)}
.faq-q[aria-expanded="true"] i{background:var(--brand)}
.faq-q[aria-expanded="true"] i::before,.faq-q[aria-expanded="true"] i::after{background:#fff}
.faq-q[aria-expanded="true"] i::after{transform:translate(-50%,-50%) rotate(0)}
.faq-a{overflow:hidden;height:0;transition:height .36s var(--ease)}
.faq-a-inner p{padding:0 44px 24px 4px;font-size:14.5px;line-height:1.85;color:var(--slate)}
.faq-a-inner b{color:var(--ink);font-weight:700}

/* 通用提示条 / 注意框 */
.note-box{
  display:flex;gap:14px;padding:18px 20px;border-radius:var(--r);background:var(--brand-050);
  border:1px solid var(--brand-100);font-size:13.5px;line-height:1.7;color:var(--brand-700);
}
.note-box .ic{width:20px;height:20px;flex:none;margin-top:2px;color:var(--brand)}
.note-box b{color:var(--brand-700)}

/* ── 05 导航与抽屉 ───────────────────────────────────────── */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:100%;z-index:210;pointer-events:none;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--brand),#6CA8F2);
}
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.9);backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid transparent;
  transition:transform .4s var(--ease),background .3s,border-color .3s,box-shadow .3s,height .3s;
}
.nav.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:0 10px 30px -24px rgba(16,24,40,.5)}
.nav.hide{transform:translateY(-100%)}
.nav-inner{display:flex;align-items:center;gap:clamp(18px,2.6vw,44px);height:var(--nav-h);transition:height .3s}
.nav.scrolled .nav-inner{height:64px}
.nav.scrolled{--nav-h:64px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:clamp(32px,2.6vw,38px);height:auto}
.brand-txt{display:flex;flex-direction:column;line-height:1;font-weight:800;font-size:clamp(17px,1.4vw,20px);letter-spacing:.06em;color:var(--ink)}
.brand-txt small{font-family:var(--font-num);font-size:8.5px;font-weight:700;letter-spacing:.24em;color:var(--muted);margin-top:5px}
.menu{display:flex;align-items:center;gap:clamp(10px,1.9vw,26px);margin-left:auto}
.nav-item{position:relative}
.nav-top{
  display:inline-flex;align-items:center;gap:5px;padding:8px 2px;font-size:14.5px;font-weight:600;
  color:var(--slate);transition:color .2s;position:relative;
}
.nav-top:hover,.nav-top.active{color:var(--brand)}
.nav-top.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--brand)}
.nav-top .caret{width:14px;height:14px;transition:transform .25s;opacity:.7}
.has-mega:hover .caret,.has-mega.open .caret{transform:rotate(180deg)}
.nav-right{display:flex;align-items:center;gap:16px;flex:none}
.nav-tel{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;transition:color .2s}
.nav-tel .ic{width:16px;height:16px;color:var(--brand)}
.nav-tel:hover{color:var(--brand)}
.burger{display:none;position:relative;width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:background .2s}
.burger:hover{background:var(--soft)}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:.3s var(--ease)}
.burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0;transform:translateX(-6px)}
.burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 服务大菜单 */
.mega{
  position:absolute;top:100%;left:50%;z-index:70;
  width:min(860px,calc(100vw - 48px));margin-top:0;padding:16px;
  display:grid;grid-template-columns:1fr 224px;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translate(-50%,10px);pointer-events:none;
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
}
.mega::before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}
.has-mega:hover .mega,.has-mega.open .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translate(-50%,0);pointer-events:auto}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:2px;align-content:start;min-width:0}
.mega-item{display:flex;align-items:center;gap:11px;padding:11px 12px;border-radius:11px;transition:background .18s;min-width:0;overflow:hidden}
.mega-item:hover{background:var(--brand-050)}
.mi-ico{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--brand-050);color:var(--brand);flex:none;transition:.2s}
.mi-ico .ic{width:19px;height:19px}
.mega-item:hover .mi-ico{background:var(--brand);color:#fff}
.mi-txt{display:flex;flex-direction:column;gap:2px;min-width:0}
.mi-txt b{font-size:13.5px;font-weight:700;color:var(--ink);white-space:nowrap}
.mi-txt small{font-size:11.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mi-arrow{width:15px;height:15px;color:var(--muted);margin-left:auto;flex:none}
.mega-promo{
  display:flex;flex-direction:column;gap:6px;padding:18px;border-radius:var(--r);
  background:linear-gradient(155deg,#0E2A47,#0A1A2E);color:#fff;position:relative;overflow:hidden;
}
.mega-promo::after{content:"";position:absolute;right:-30%;top:-30%;width:70%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(46,123,214,.4),transparent 65%)}
.mp-tag{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-size:11px;font-weight:800;letter-spacing:.08em;color:var(--brand-200)}
.mp-tag .ic{width:14px;height:14px}
.mega-promo b{font-size:15px;font-weight:800;color:#fff;margin-top:6px;line-height:1.4}
.mega-promo span{font-size:12px;line-height:1.65;color:rgba(255,255,255,.6);position:relative;z-index:1}
.mega-promo em{display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:14px;font-style:normal;font-size:12.5px;font-weight:700;color:var(--brand-200);position:relative;z-index:1}
.mega-promo em .ic{width:15px;height:15px}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;
  padding:calc(var(--nav-h) + 18px) var(--pad) 28px;
  background:
    radial-gradient(600px 320px at 90% 0%,rgba(46,123,214,.28),transparent 65%),
    linear-gradient(160deg,#0A1B31,#0A1A2E);
  color:#fff;transform:translateY(-102%);visibility:hidden;pointer-events:none;
  transition:transform .46s var(--ease),visibility .46s;
  overflow:hidden;
}
.drawer.open{transform:none;visibility:visible;pointer-events:auto}
.drawer-scroll{flex:1;overflow-y:auto;overscroll-behavior:contain;display:flex;flex-direction:column}
.drawer-nav a,.drawer-scroll a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 2px;border-bottom:1px solid rgba(255,255,255,.09);font-size:clamp(17px,4.4vw,21px);font-weight:700;color:#fff}
.drawer-scroll a::after{content:"";width:7px;height:7px;border-top:1.5px solid rgba(255,255,255,.4);border-right:1.5px solid rgba(255,255,255,.4);transform:rotate(45deg);flex:none}
.drawer-scroll a:hover{color:var(--brand-200)}
.drawer-scroll .dg{display:block;font-size:10.5px;font-weight:800;letter-spacing:.2em;color:rgba(255,255,255,.36);padding:20px 2px 4px;text-transform:uppercase}
.drawer-scroll .dg:first-child{padding-top:0}
.drawer-foot{flex:none;display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);margin-top:16px}
.drawer-foot .btn{height:50px}
.drawer-foot>span{font-size:12px;color:rgba(255,255,255,.45);text-align:center;margin-top:2px}

/* 移动端底部 CTA */
.mbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;
  grid-template-columns:1fr 1.4fr;gap:10px;padding:10px var(--pad) calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.94);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);box-shadow:0 -10px 30px -22px rgba(16,24,40,.5);
  transition:transform .3s var(--ease);
}
.mbar.hide{transform:translateY(110%)}
.mbar-btn{display:flex;align-items:center;justify-content:center;gap:8px;height:48px;border-radius:12px;font-size:14.5px;font-weight:700}
.mbar-btn .ic{width:18px;height:18px}
.mbar-tel{background:var(--soft);color:var(--ink);border:1px solid var(--line)}
.mbar-cta{background:linear-gradient(135deg,#3C8AE0,#2E7BD6);color:#fff;box-shadow:0 10px 22px -12px rgba(46,123,214,.8)}

/* 回到顶部 */
.totop{
  position:fixed;right:clamp(14px,2.2vw,28px);bottom:clamp(18px,2.6vw,34px);z-index:80;
  display:grid;place-items:center;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--slate);box-shadow:var(--shadow-sm);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.3s var(--ease);
}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{color:var(--brand);border-color:var(--brand-200);box-shadow:var(--shadow)}
.totop .ic{width:19px;height:19px}

/* ── 06 页脚 ─────────────────────────────────────────────── */
.foot{background:linear-gradient(180deg,#081626,#0A1A2E);color:rgba(255,255,255,.62);padding:clamp(48px,6vw,84px) 0 26px;position:relative;overflow:hidden}
.foot::before{content:"";position:absolute;right:-10%;top:-30%;width:46%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(46,123,214,.16),transparent 62%)}
.foot .wrap{position:relative}
.foot-main{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.1fr;gap:clamp(24px,3.6vw,56px);padding-bottom:clamp(32px,4vw,52px)}
.foot-brand .brand-txt{color:#fff}
.foot-brand .brand-txt small{color:rgba(255,255,255,.42)}
.foot-brand p{font-size:13px;line-height:1.8;color:rgba(255,255,255,.48);margin-top:16px;max-width:30em}
.foot-contact{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.foot-contact a,.foot-contact span{display:flex;align-items:center;gap:9px;font-size:13px;color:rgba(255,255,255,.6);transition:color .2s}
.foot-contact a:hover{color:#fff}
.foot-contact .ic{width:15px;height:15px;color:rgba(255,255,255,.4);flex:none}
.foot-col{display:flex;flex-direction:column;gap:11px}
.foot-col b{font-size:12px;font-weight:800;letter-spacing:.16em;color:rgba(255,255,255,.42);text-transform:uppercase;margin-bottom:4px}
.foot-col a{font-size:13.5px;color:rgba(255,255,255,.62);transition:color .2s,transform .2s;width:fit-content}
.foot-col a:hover{color:#fff;transform:translateX(2px)}
.foot-cta{background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:22px}
.foot-cta b{display:block;font-size:clamp(19px,1.7vw,23px);font-weight:800;color:#fff;line-height:1.35;letter-spacing:-.02em}
.foot-cta p{font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.5);margin:10px 0 16px}
.foot-cta .btn{width:100%;height:46px;font-size:14px}
.foot-selfcheck{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:12.5px;font-weight:700;color:var(--brand-200)}
.foot-selfcheck .ic{width:15px;height:15px}
.foot-selfcheck:hover{color:#fff}
.foot-bottom{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:rgba(255,255,255,.36)}
.foot-note{flex-basis:100%;font-size:11.5px;color:rgba(255,255,255,.28);line-height:1.7}

/* ── 07 通用组件 ─────────────────────────────────────────── */
/* 数据表 */
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th{font-size:11.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.data-table td{padding:15px 16px;border-bottom:1px solid var(--line-soft);vertical-align:top;line-height:1.7}
.data-table tr:last-child td{border-bottom:0}
.data-table td b{font-weight:700}

/* 时间线 */
.timeline{display:flex;flex-direction:column;gap:0;position:relative}
.tl-item{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:22px 0;border-top:1px solid var(--line);position:relative}
.tl-item:first-child{border-top:0;padding-top:0}
.tl-time{font-size:13px;font-weight:800;color:var(--brand);line-height:1.6}
.tl-body b{display:block;font-size:16.5px;font-weight:800;color:var(--ink);margin-bottom:6px}
.tl-body p{font-size:14px;line-height:1.8;color:var(--slate)}

/* 结果对比条 */
.result-bars{display:flex;flex-direction:column;gap:22px}
.rb-row{display:flex;flex-direction:column;gap:10px}
.rb-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px}
.rb-head b{font-size:14.5px;font-weight:700;color:var(--ink)}
.rb-head span{font-size:13px;font-weight:700;color:var(--green)}
.rb-bars{display:flex;flex-direction:column;gap:7px}
.rb-bar{display:flex;align-items:center;gap:12px;font-size:12px}
.rb-bar .rb-label{width:42px;flex:none;color:var(--muted)}
.rb-track{flex:1;height:9px;border-radius:99px;background:var(--line-soft);overflow:hidden}
.rb-fill{height:100%;border-radius:99px;background:#C9D5E4;width:0;transition:width 1.1s var(--ease-out)}
.rb-fill.after{background:linear-gradient(90deg,var(--brand),#6CA8F2)}
.rb-bar em{font-style:normal;width:74px;text-align:right;font-weight:700;color:var(--slate);flex:none}
.rb-bar.after em{color:var(--brand)}

/* 图文块 */
.figure{border-radius:var(--r-lg);overflow:hidden;position:relative;box-shadow:var(--shadow)}
.figure img{width:100%;height:100%;object-fit:cover}
.figure figcaption{position:absolute;left:0;right:0;bottom:0;padding:22px;font-size:12px;color:rgba(255,255,255,.8);background:linear-gradient(180deg,transparent,rgba(8,22,38,.66))}

/* 分页 / 下一篇 */
.next-link{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 0;border-top:1px solid var(--line)}
.next-link span{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}
.next-link b{font-size:17px;font-weight:800;color:var(--ink);transition:color .2s}
.next-link:hover b{color:var(--brand)}
.next-link .ic{width:22px;height:22px;color:var(--brand)}

/* ── 08 动效与可访问性 ───────────────────────────────────── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:var(--d,0ms)}
.reveal.in{opacity:1;transform:none}
html.no-js .reveal{opacity:1;transform:none}
.anim-fade-up{animation:fadeUp .8s var(--ease-out) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.parallax{will-change:transform}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

/* ── 09 响应式 ───────────────────────────────────────────── */
@media (max-width:1120px){
  .menu{display:none}
  .burger{display:flex}
  .nav-tel{display:none}
  .mega{display:none}
  .ph-grid{grid-template-columns:1fr;align-items:start}
  .ph-aside{display:none}
  .cta-inner{grid-template-columns:1fr;gap:24px}
  .cta-act{flex-direction:row;flex-wrap:wrap}
  .cta-act .btn{width:auto;min-width:220px}
  .foot-main{grid-template-columns:1.4fr 1fr 1fr}
  .foot-cta{grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;gap:18px}
  .foot-cta b{font-size:20px}
  .foot-cta p{margin:0;flex:1;min-width:220px}
  .foot-cta .btn{width:auto;min-width:200px}
  .foot-selfcheck{margin-top:0}
  .mbar{display:grid}
  .totop{bottom:calc(76px + env(safe-area-inset-bottom))}
  body{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
  .drawer{padding-top:calc(var(--nav-h) + 14px)}
}
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .split,.split-aside{grid-template-columns:1fr;gap:30px}
  .subnav .sn-cta{display:none}
  .statband{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--line-soft)}
  .statband-dark .stat:nth-child(3),.statband-dark .stat:nth-child(4){border-top-color:rgba(255,255,255,.1)}
  .stat:nth-child(2){border-left:1px solid var(--line-soft)}
  .lead-form .f-row{grid-template-columns:1fr}
  .foot-main{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1 / -1}
  .tl-item{grid-template-columns:1fr;gap:8px}
  .subnav{top:calc(var(--nav-h) - 1px)}
}
@media (max-width:640px){
  body{font-size:15px}
  h1{font-size:clamp(30px,8.4vw,40px)}
  h2{font-size:clamp(24px,6.6vw,30px)}
  .sec-head{margin-bottom:30px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .btn-lg,.btn-xl{height:52px;font-size:15px;padding:0 24px}
  .ph-act .btn{width:100%}
  .ph-chips{gap:8px 16px}
  .cta-act{flex-direction:column;align-items:stretch}
  .cta-act .btn{width:100%;max-width:none}
  .foot-main{grid-template-columns:1fr;gap:26px}
  .foot-cta{flex-direction:column;align-items:flex-start;padding:20px}
  .foot-cta .btn{width:100%}
  .faq-a-inner p{padding-right:16px}
  .card{padding:20px}
  .tl-item,.next-link{padding-left:0;padding-right:0}
  .breadcrumb ol{font-size:12px}
  .mbar-btn{height:46px;font-size:14px}
}

/* 截图/验收模式（?shot=1） */
html.shot-mode .reveal{opacity:1!important;transform:none!important;transition:none!important}
html.shot-mode .faq-a{height:auto!important}
html.shot-mode .nav.hide{transform:none!important}
html.shot-mode .mbar.hide{transform:none!important}
html.shot-mode .hero-txt h1 .hl::after{animation:none;transform:scaleX(1)}
html.shot-mode .btn.is-loading{opacity:1}

/* 锚点偏移（吸顶导航高度） */
section[id],div[id].anchor{scroll-margin-top:calc(var(--nav-h) + 18px)}