/* ==========================================================================
   3DMark 中文站 · www.3d-mark.cn
   单文件全站样式 · 深色科技风
   ========================================================================== */

:root{
  --bg:#070a12;
  --bg-soft:#0a101d;
  --panel:#0d1424;
  --panel-2:#111a2e;
  --line:rgba(148,163,184,.14);
  --line-2:rgba(148,163,184,.24);
  --txt:#e8edf7;
  --txt-dim:#a3b3ca;
  --txt-mute:#6b7c96;
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --violet:#8b5cf6;
  --green:#4ade80;
  --amber:#fbbf24;
  --red:#f87171;
  --grad:linear-gradient(135deg,#22d3ee,#3b82f6 55%,#8b5cf6);
  --grad-soft:linear-gradient(135deg,rgba(34,211,238,.16),rgba(59,130,246,.10) 55%,rgba(139,92,246,.14));

  --wrap:1240px;
  --gutter:24px;
  --side:236px;
  --header-h:64px;
  --sp-section:86px;
  --sp-section-sm:56px;

  --r-sm:8px;
  --r:14px;
  --r-lg:20px;
  --sh:0 18px 44px -20px rgba(2,6,23,.85);
  --sh-hi:0 26px 60px -22px rgba(34,211,238,.30);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}

body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Segoe UI",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 顶部光晕 + 网格 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 420px at 14% -6%,rgba(34,211,238,.16),transparent 62%),
    radial-gradient(760px 460px at 88% 2%,rgba(139,92,246,.15),transparent 64%),
    radial-gradient(900px 520px at 50% 108%,rgba(59,130,246,.12),transparent 66%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(148,163,184,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.075) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(1000px 620px at 50% 0%,#000 8%,transparent 78%);
  mask-image:radial-gradient(1000px 620px at 50% 0%,#000 8%,transparent 78%);
}
body > *{position:relative;z-index:1}

img{max-width:100%;height:auto;display:block}
a{color:var(--cyan);text-decoration:none;transition:color .2s}
a:hover{color:#67e8f9}
ul,ol{margin:0;padding:0}
li{list-style:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:#fff;letter-spacing:.2px}
h1{font-size:clamp(1.65rem,3.5vw,2.5rem)}
h2{font-size:clamp(1.3rem,2.6vw,1.85rem)}
h3{font-size:clamp(1.03rem,1.6vw,1.16rem)}
h4{font-size:1rem}
code,kbd,pre{font-family:"JetBrains Mono",Consolas,"Courier New",monospace}
hr{border:0;border-top:1px solid var(--line);margin:34px 0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(34,211,238,.3)}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-9999px}

/* ---------------- 顶部滚动进度 ---------------- */
.progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--grad);z-index:120;
  box-shadow:0 0 12px rgba(34,211,238,.75);
}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,10,18,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.45),transparent);
}
.hdr{display:flex;align-items:center;gap:18px;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:#fff}
.brand-logo{height:26px;width:auto;display:block}
.brand-sub{
  font-size:.62rem;color:var(--cyan);letter-spacing:2.6px;white-space:nowrap;
  padding:3px 9px;border-radius:999px;
  border:1px solid rgba(34,211,238,.34);background:rgba(34,211,238,.09);
}

.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav a{
  color:var(--txt-dim);font-size:.92rem;padding:8px 12px;border-radius:9px;
  white-space:nowrap;transition:.2s;
}
.nav a:hover{color:#fff;background:rgba(148,163,184,.1)}
.nav a[aria-current="page"]{color:#fff;background:var(--grad-soft);box-shadow:inset 0 0 0 1px rgba(34,211,238,.3)}

.hdr-cta{margin-left:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line-2);border-radius:10px;
  background:rgba(148,163,184,.07);color:var(--txt);cursor:pointer;
  margin-left:auto;font-size:1.15rem;line-height:1;
  align-items:center;justify-content:center;
}
body.nav-open .nav-toggle{background:var(--grad-soft);border-color:rgba(34,211,238,.4)}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 20px;border-radius:11px;border:1px solid var(--line-2);
  background:rgba(148,163,184,.08);color:var(--txt);
  font-size:.94rem;font-weight:600;font-family:inherit;cursor:pointer;
  transition:transform .2s,box-shadow .2s,border-color .2s,background .2s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);border-color:rgba(34,211,238,.55);color:#fff;background:rgba(148,163,184,.14)}
.btn-primary{
  background:var(--grad);border-color:transparent;color:#04121c;
  box-shadow:0 14px 30px -14px rgba(34,211,238,.75);
}
.btn-primary:hover{color:#04121c;box-shadow:var(--sh-hi)}
.btn-lg{padding:14px 28px;font-size:1.02rem;border-radius:13px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------------- 面包屑 ---------------- */
.crumbs{
  padding-top:20px;font-size:.82rem;color:var(--txt-mute);
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
}
.crumbs a{color:var(--txt-mute)}
.crumbs a:hover{color:var(--cyan)}
.crumbs span{opacity:.5}

/* ---------------- 通用胶囊 ---------------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:.79rem;font-weight:600;letter-spacing:.4px;
  color:#7dd3fc;background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.32);
}
.pill--violet{color:#c4b5fd;background:rgba(139,92,246,.12);border-color:rgba(139,92,246,.34)}
.pill--green{color:#86efac;background:rgba(74,222,128,.1);border-color:rgba(74,222,128,.3)}
.pill--amber{color:#fcd34d;background:rgba(251,191,36,.1);border-color:rgba(251,191,36,.32)}
.pill--red{color:#fca5a5;background:rgba(248,113,113,.1);border-color:rgba(248,113,113,.34)}

/* ---------------- 章节节奏 ---------------- */
section{padding:var(--sp-section) 0}
section.tight{padding:var(--sp-section-sm) 0}
section.no-top{padding-top:0}
section.no-bottom{padding-bottom:0}

.band{
  background:linear-gradient(180deg,rgba(13,20,36,0) 0%,rgba(13,20,36,.62) 12%,rgba(13,20,36,.62) 88%,rgba(13,20,36,0) 100%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  position:relative;
}
.band::before,.band::after{
  content:"";position:absolute;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.4),transparent);
}
.band::before{top:-1px}
.band::after{bottom:-1px}

/* 当 .band 出现在 .wrap 内部时，向外扩展到视口宽度，保持全宽节奏带效果 */
.wrap > .band{
  margin-left:calc(50% - 50vw);
  margin-right:calc(50% - 50vw);
  padding-left:calc(50vw - 50%);
  padding-right:calc(50vw - 50%);
}

/* 居中标题区 */
.section-head{max-width:800px;margin:0 auto 46px;text-align:center}
.section-head .pill{margin-bottom:16px}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--txt-dim);margin:0;font-size:1rem}

/* 左标题 + 右说明 */
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:34px;
  padding-bottom:18px;margin-bottom:38px;position:relative;flex-wrap:wrap;
}
.sec-head::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,.55),rgba(139,92,246,.3) 42%,transparent 88%);
}
.sec-head-l{max-width:640px}
.sec-head-l .pill{margin-bottom:14px}
.sec-head-l h2{margin-bottom:10px}
.sec-head-l p{color:var(--txt-dim);margin:0;font-size:.96rem}
.sec-head-r{font-size:.86rem;color:var(--txt-mute);text-align:right;max-width:290px}
.sec-head-r b{color:var(--cyan);font-weight:700}

/* 左侧渐变竖线标题 */
.rail-head{position:relative;padding-left:18px;margin-bottom:22px}
.rail-head::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--blue) 55%,var(--violet));
}
.rail-head h2,.rail-head h3{margin-bottom:6px}
.rail-head p{margin:0;color:var(--txt-dim);font-size:.94rem}

/* ---------------- Hero ---------------- */
.hero{padding:74px 0 68px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero h1{margin:18px 0 20px}
.hero h1 .hl{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-lead{font-size:1.06rem;color:var(--txt-dim);max-width:600px;margin-bottom:26px}
.hero-act{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:.85rem;color:var(--txt-mute)}
.hero-meta b{color:var(--txt);font-weight:600}

.hero-visual{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(17,26,46,.92),rgba(9,14,26,.92));
  box-shadow:var(--sh);padding:26px;position:relative;overflow:hidden;
}
.hero-visual::before{
  content:"";position:absolute;inset:-40% 40% 55% -20%;
  background:radial-gradient(circle,rgba(34,211,238,.22),transparent 68%);
  pointer-events:none;
}
.hv-top{display:flex;align-items:center;gap:12px;margin-bottom:18px;position:relative}
.hv-top img{width:54px;height:54px;border-radius:14px}
.hv-top b{display:block;font-size:.98rem;color:#fff}
.hv-top span{font-size:.78rem;color:var(--txt-mute)}
.hv-list{display:grid;gap:10px;position:relative}
.hv-row{
  display:grid;grid-template-columns:minmax(0,1fr) 92px;align-items:center;gap:12px;
  padding:10px 14px;border-radius:11px;background:rgba(148,163,184,.06);
  border:1px solid var(--line);font-size:.87rem;
}
.hv-row .bar{display:block;height:6px;border-radius:4px;background:rgba(148,163,184,.16);overflow:hidden}
.hv-row .bar i{display:block;height:100%;border-radius:4px;background:var(--grad)}
.hv-row .val{text-align:right;color:var(--cyan);font-weight:700;font-size:.78rem;line-height:1.35}
.hv-row .nm{color:var(--txt);font-weight:600;margin-bottom:7px;display:block;font-size:.88rem}

/* ---------------- 数据条 ---------------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
}
.stat{background:var(--panel);padding:24px 20px;text-align:center}
.stat b{display:block;font-size:1.65rem;line-height:1.2;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  font-variant-numeric:tabular-nums}
.stat span{font-size:.83rem;color:var(--txt-mute)}

/* ---------------- 卡片 ---------------- */
.card{
  background:linear-gradient(165deg,rgba(17,26,46,.9),rgba(11,17,31,.9));
  border:1px solid var(--line);border-radius:var(--r);
  padding:24px;position:relative;
  transition:transform .24s,border-color .24s,box-shadow .24s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.42);box-shadow:var(--sh)}
.card h3{margin-bottom:10px}
.card p:last-child{margin-bottom:0}
.card p{color:var(--txt-dim);font-size:.93rem}
.card--plain{background:none;border:0;padding:16px 0}
.card--plain:hover{transform:none;box-shadow:none;border:0}
.card--plain h3{font-size:1.02rem}
.card--accent{border-top:2px solid transparent;border-image:var(--grad) 1;border-image-slice:1 0 0 0}
.card--row{
  display:grid;grid-template-columns:42px minmax(0,1fr);
  grid-template-rows:auto auto;column-gap:16px;row-gap:6px;align-content:start;
}
.card--row .ico{
  grid-row:1 / span 2;width:42px;height:42px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid rgba(34,211,238,.26);
  font-size:1.15rem;line-height:1;
}
.card--row h3{margin:0}
.card--row p{margin:0}
.card-ico-lg{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid rgba(34,211,238,.26);
  font-size:1.4rem;margin-bottom:16px;
}
.card .tagline{font-size:.79rem;color:var(--txt-mute);margin-top:10px;
  padding-top:10px;border-top:1px solid var(--line)}

/* 网格 */
.grid{display:grid;gap:20px}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g-asym{grid-template-columns:1.35fr 1fr}
.g-side{grid-template-columns:.78fr 1.22fr;align-items:start}
.g-side-rev{grid-template-columns:1.22fr .78fr;align-items:start}

/* ---------------- 泳道（流程） ---------------- */
.lane{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;position:relative}
.lane-item{position:relative;padding-top:52px}
.lane-item::before{
  content:attr(data-n);position:absolute;top:0;left:0;
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.95rem;color:#04121c;background:var(--grad);
  box-shadow:0 10px 22px -12px rgba(34,211,238,.85);
}
.lane-item::after{
  content:"";position:absolute;top:19px;left:50px;right:-22px;height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,.5),rgba(148,163,184,.1));
}
.lane-item:last-child::after{display:none}
.lane-item h3{font-size:1rem;margin-bottom:8px}
.lane-item p{color:var(--txt-dim);font-size:.9rem;margin:0}

/* ---------------- 步骤 ---------------- */
.steps{counter-reset:s;display:grid;gap:14px}
.steps li{
  counter-increment:s;position:relative;
  padding:16px 20px 16px 62px;border-radius:var(--r);
  background:rgba(148,163,184,.05);border:1px solid var(--line);font-size:.94rem;
}
.steps li::before{
  content:counter(s);position:absolute;left:18px;top:15px;
  width:28px;height:28px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  font-size:.82rem;font-weight:700;color:var(--cyan);
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.32);
}
.steps li b{color:#fff}
.steps li p{margin:6px 0 0;color:var(--txt-dim);font-size:.9rem}
.steps li:last-child{margin-bottom:0}

/* ---------------- 代码块 ---------------- */
.code{
  position:relative;background:#060a13;border:1px solid var(--line);
  border-radius:12px;margin:16px 0;overflow:hidden;
}
.code-hd{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 14px;border-bottom:1px solid var(--line);
  background:rgba(148,163,184,.055);font-size:.79rem;color:var(--txt-mute);
}
.code pre{margin:0;padding:15px 16px;overflow-x:auto;font-size:.87rem;line-height:1.7;color:#c7d7ee}
.code code{white-space:pre}
.copy{
  border:1px solid var(--line-2);background:rgba(148,163,184,.08);color:var(--txt-dim);
  padding:4px 11px;border-radius:7px;font-size:.76rem;font-family:inherit;cursor:pointer;transition:.2s;
}
.copy:hover{color:#fff;border-color:rgba(34,211,238,.5)}
.copy.ok{color:#86efac;border-color:rgba(74,222,128,.5)}
kbd{
  display:inline-block;padding:2px 7px;border-radius:5px;font-size:.8rem;
  background:rgba(148,163,184,.14);border:1px solid var(--line-2);color:#dce8f8;
}

/* ---------------- 表格 ---------------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:rgba(11,17,31,.6);
}
table{width:100%;border-collapse:collapse;font-size:.91rem}
thead th{
  text-align:left;padding:13px 18px;white-space:nowrap;
  background:rgba(148,163,184,.07);color:#fff;font-weight:600;
  border-bottom:1px solid var(--line-2);font-size:.87rem;
}
tbody td{padding:13px 18px;border-bottom:1px solid var(--line);color:var(--txt-dim);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(34,211,238,.045)}
tbody td b,tbody td strong{color:var(--txt)}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}

/* ---------------- 常见问题手风琴 ---------------- */
.acc{display:grid;gap:12px}
.acc-item{
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(148,163,184,.045);overflow:hidden;transition:border-color .22s;
}
.acc-item[open],.acc-item.open{border-color:rgba(34,211,238,.36)}
.acc-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;background:none;border:0;color:#fff;font-family:inherit;
  font-size:.99rem;font-weight:600;text-align:left;cursor:pointer;
}
.acc-q:hover{color:var(--cyan)}
.acc-q .ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;font-size:1rem;line-height:1;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.28);color:var(--cyan);
  transition:transform .25s;
}
.acc-item.open .acc-q .ico{transform:rotate(45deg)}
.acc-a{display:none;padding:0 20px 18px;color:var(--txt-dim);font-size:.93rem}
.acc-a p:last-child{margin-bottom:0}
.acc-a ul{margin:10px 0}
.acc-a li{position:relative;padding-left:18px;margin-bottom:7px}
.acc-a li::before{content:"";position:absolute;left:2px;top:.68em;width:6px;height:6px;border-radius:2px;background:var(--cyan);opacity:.75}
.acc-item.open .acc-a{display:block}

/* ---------------- 时间线（更新日志） ---------------- */
.legend{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:30px;font-size:.82rem;color:var(--txt-mute)}
.legend i{display:inline-block;width:9px;height:9px;border-radius:3px;margin-right:7px;vertical-align:middle}
.lg-new{background:var(--cyan)}
.lg-fix{background:var(--amber)}
.lg-imp{background:var(--violet)}

.timeline{position:relative;padding-left:30px}
.timeline::before{
  content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--cyan),rgba(139,92,246,.5) 55%,rgba(148,163,184,.12));
}
.rel{position:relative;padding-bottom:34px}
.rel:last-child{padding-bottom:0}
.rel::before{
  content:"";position:absolute;left:-30px;top:7px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:3px solid var(--cyan);box-shadow:0 0 0 4px rgba(34,211,238,.12);
}
.rel-head{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.rel-head b{font-size:1.12rem;color:#fff;font-variant-numeric:tabular-nums}
.rel-head time{font-size:.83rem;color:var(--txt-mute)}
.rel-body{background:rgba(148,163,184,.045);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.rel-body h4{font-size:.86rem;letter-spacing:.6px;margin-bottom:9px;display:flex;align-items:center;gap:8px}
.rel-body h4::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--cyan)}
.rel-body h4.f::before{background:var(--amber)}
.rel-body h4.i::before{background:var(--violet)}
.rel-body ul{margin:0 0 16px}
.rel-body ul:last-child{margin-bottom:0}
.rel-body li{position:relative;padding-left:17px;color:var(--txt-dim);font-size:.92rem;margin-bottom:7px}
.rel-body li::before{content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;border-radius:2px;background:var(--txt-mute)}

/* ---------------- 提示条 ---------------- */
.note{
  display:grid;grid-template-columns:26px minmax(0,1fr);gap:14px;
  padding:16px 20px;border-radius:var(--r);font-size:.92rem;
  border:1px solid rgba(34,211,238,.3);background:rgba(34,211,238,.07);color:#cffafe;
}
.note .ico{font-size:1.1rem;line-height:1.5}
.note p:last-child{margin-bottom:0}
.note--warn{border-color:rgba(251,191,36,.34);background:rgba(251,191,36,.075);color:#fde68a}
.note--danger{border-color:rgba(248,113,113,.36);background:rgba(248,113,113,.08);color:#fecaca}
.note--ok{border-color:rgba(74,222,128,.32);background:rgba(74,222,128,.075);color:#bbf7d0}
.note b{color:#fff}

/* ---------------- 下载页 · 主入口 ---------------- */
.dl-hero{
  display:grid;grid-template-columns:1.22fr .78fr;gap:0;
  border:1px solid var(--line-2);border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(160deg,rgba(17,26,46,.95),rgba(9,14,26,.95));
  box-shadow:var(--sh);margin:34px 0 22px;
}
.dl-hero-lead{padding:34px 36px;border-right:1px solid var(--line);position:relative}
.dl-hero-lead::before{
  content:"";position:absolute;top:-60px;left:-40px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(34,211,238,.16),transparent 68%);pointer-events:none;
}
.dl-hero-lead h2{margin:18px 0 12px;position:relative}
.dl-hero-lead > p{color:var(--txt-dim);font-size:.96rem;position:relative}
.dl-hero-act{display:flex;flex-wrap:wrap;gap:13px;margin:22px 0 20px;position:relative}
.dl-hero-meta{display:flex;flex-wrap:wrap;gap:9px;position:relative}
.dl-hero-meta span{
  padding:5px 12px;border-radius:999px;font-size:.79rem;color:var(--txt-dim);
  background:rgba(148,163,184,.08);border:1px solid var(--line);
}
.dl-hero-side{
  padding:30px 30px;background:rgba(6,10,19,.55);
  display:flex;flex-direction:column;justify-content:center;gap:16px;
}
.dl-hero-side .lbl{font-size:.82rem;color:var(--txt-mute)}
.qr-card{
  display:inline-flex;padding:12px;border-radius:14px;background:#f7f9fc;
  border:1px solid rgba(148,163,184,.3);width:fit-content;
}
.qr-card a{display:block;line-height:0}
.qr-card img{width:150px;height:150px;border-radius:5px}
.qr-card--lg img{width:212px;height:212px}
.qr-tip{font-size:.82rem;color:var(--txt-mute);line-height:1.6}

/* 文件清单 */
.files{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:rgba(11,17,31,.55)}
.files-row{
  display:grid;grid-template-columns:258px minmax(0,1fr);gap:20px;
  padding:15px 20px;border-bottom:1px solid var(--line);align-items:start;
}
.files-row:last-child{border-bottom:0}
.files-row:hover{background:rgba(34,211,238,.04)}
.files-row b{color:#fff;font-size:.94rem;font-weight:600;display:block}
.files-row span.d{font-size:.78rem;color:var(--txt-mute)}
.files-row p{margin:0;color:var(--txt-dim);font-size:.9rem}

/* ---------------- 下载弹窗 ---------------- */
.dl-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:18px}
.dl-modal[hidden]{display:none}
.dl-modal-mask{position:absolute;inset:0;background:rgba(3,6,12,.78);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.dl-modal-box{
  position:relative;width:100%;max-width:760px;
  max-height:calc(100vh - 36px);overflow-y:auto;
  background:linear-gradient(165deg,#101a2e,#0a111f);
  border:1px solid rgba(34,211,238,.28);border-radius:var(--r-lg);
  box-shadow:0 40px 90px -30px rgba(2,6,23,.95);
  animation:dlIn .26s ease-out;
}
@keyframes dlIn{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.dl-modal-x{
  position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:10px;
  border:1px solid var(--line-2);background:rgba(148,163,184,.08);color:var(--txt-dim);
  font-size:1.1rem;line-height:1;cursor:pointer;z-index:2;
}
.dl-modal-x:hover{color:#fff;border-color:rgba(34,211,238,.5)}
.dl-modal-head{padding:28px 32px 20px;border-bottom:1px solid var(--line)}
.dl-modal-head h2{margin:14px 0 8px;font-size:1.3rem}
.dl-modal-head p{margin:0;color:var(--txt-dim);font-size:.9rem}
.dl-modal-body{
  display:grid;grid-template-columns:296px minmax(0,1fr);gap:0;
}
.dl-modal-qr{
  padding:26px 28px;border-right:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  background:rgba(6,10,19,.4);
}
.dl-modal-qr .qr-tip{max-width:230px}
.dl-modal-act{padding:26px 30px;display:flex;flex-direction:column;gap:12px}
.dl-modal-act .btn{width:100%}
.dl-mini{display:grid;gap:9px;margin-top:6px}
.dl-mini li{position:relative;padding-left:19px;font-size:.85rem;color:var(--txt-mute)}
.dl-mini li::before{content:"";position:absolute;left:2px;top:.68em;width:6px;height:6px;border-radius:2px;background:var(--cyan);opacity:.7}
.dl-modal-foot{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:15px 32px 22px;border-top:1px solid var(--line);
  font-size:.78rem;color:var(--txt-mute);
}
body.dl-lock{overflow:hidden}

/* ---------------- 文档双栏 ---------------- */
.doc{
  display:grid;grid-template-columns:var(--side) minmax(0,1fr);
  gap:var(--gutter);align-items:start;
}
.doc-toc{
  position:sticky;top:calc(var(--header-h) + 24px);
  max-height:calc(100vh - var(--header-h) - 48px);overflow-y:auto;
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(11,17,31,.6);padding:16px;
}
.doc-toc::-webkit-scrollbar{width:5px}
.doc-toc::-webkit-scrollbar-thumb{background:rgba(148,163,184,.25);border-radius:4px}
.toc-toggle{
  display:none;width:100%;align-items:center;justify-content:space-between;
  background:none;border:0;color:#fff;font-family:inherit;font-size:.92rem;font-weight:600;
  cursor:pointer;padding:2px 0;
}
.toc-toggle .ico{color:var(--cyan);font-size:1.05rem}
.toc-title{font-size:.76rem;letter-spacing:1.6px;color:var(--txt-mute);margin-bottom:11px}
.toc{display:grid;gap:2px}
.toc a{
  display:block;padding:7px 11px;border-radius:8px;font-size:.87rem;
  color:var(--txt-dim);border-left:2px solid transparent;transition:.2s;
}
.toc a:hover{color:#fff;background:rgba(148,163,184,.09)}
.toc a.active{color:var(--cyan);background:rgba(34,211,238,.09);border-left-color:var(--cyan)}
.doc-main{min-width:0}
.doc-main > section{padding:0 0 52px}
.doc-main > section:last-of-type{padding-bottom:0}
.doc-main .doc-h2{
  margin:0 0 22px;padding:0 0 14px;position:relative;
  font-size:clamp(1.24rem,2.2vw,1.55rem);border-bottom:1px solid var(--line);
}
.doc-main .doc-h2::after{
  content:"";position:absolute;left:0;bottom:-1px;width:180px;height:2px;
  background:linear-gradient(90deg,rgba(34,211,238,.75),rgba(139,92,246,.3));
}
.doc-main .doc-h2 .cnt{font-size:.8rem;color:var(--txt-mute);font-weight:400;margin-left:10px}
.doc-lead{color:var(--txt-dim);font-size:1rem}
.wrap .doc-main .wrap{max-width:none;padding:0;margin:0}

/* 正文排版 */
.prose{max-width:820px}
.prose > h2{margin:44px 0 16px;position:relative;padding-left:16px}
.prose > h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--blue) 60%,var(--violet));
}
.prose > h3{margin:28px 0 10px;color:#fff}
.prose p{color:var(--txt-dim)}
.prose strong,.prose b{color:#fff}
.prose ul,.prose ol{margin:14px 0}
.prose li{position:relative;padding-left:20px;color:var(--txt-dim);margin-bottom:8px}
.prose li::before{content:"";position:absolute;left:2px;top:.7em;width:6px;height:6px;border-radius:2px;background:var(--cyan);opacity:.7}
.prose > *:first-child{margin-top:0}

/* 文档区 h2 底边标尺（排除 .prose 内） */
.wrap:not(.prose) > h2{
  padding-bottom:14px;margin:38px 0 22px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(90deg,rgba(34,211,238,.6),rgba(139,92,246,.25) 40%,transparent 80%);
  background-repeat:no-repeat;background-size:180px 2px;background-position:left bottom;
}

/* 继续阅读 */
.related{padding:var(--sp-section-sm) 0;border-top:1px solid var(--line);margin-top:52px}
.related .rail-head{margin-bottom:24px}
.rel-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.rel-link{
  display:block;padding:20px 22px;border:1px solid var(--line);border-radius:var(--r);
  background:rgba(148,163,184,.05);transition:.22s;
}
.rel-link:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.42);box-shadow:var(--sh)}
.rel-link b{display:block;color:#fff;margin-bottom:6px;font-size:.98rem}
.rel-link span{font-size:.86rem;color:var(--txt-mute)}
.rel-link i{font-style:normal;color:var(--cyan);font-size:.82rem}

/* ---------------- CTA ---------------- */
.cta{
  border:1px solid rgba(34,211,238,.3);border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(34,211,238,.13),rgba(59,130,246,.08) 55%,rgba(139,92,246,.13));
  padding:46px 40px;text-align:center;position:relative;overflow:hidden;
}
.cta::before{
  content:"";position:absolute;inset:-50% 60% 30% -10%;
  background:radial-gradient(circle,rgba(34,211,238,.2),transparent 66%);pointer-events:none;
}
.cta h2{margin-bottom:12px;position:relative}
.cta p{color:var(--txt-dim);max-width:620px;margin:0 auto 26px;position:relative}
.cta-act{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative}

/* ---------------- 图集 / 灯箱 ---------------- */
.shots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:start}
.shots--mid{grid-template-columns:1fr;max-width:780px;margin:0 auto}
.shot{
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:rgba(11,17,31,.6);cursor:zoom-in;padding:0;border-width:1px;
  transition:transform .22s,border-color .22s,box-shadow .22s;text-align:left;font-family:inherit;
}
.shot:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.42);box-shadow:var(--sh)}
.shot img{background:#f7f9fc;width:100%;border-bottom:1px solid var(--line)}
.shot figcaption,.shot .cap{padding:13px 16px;font-size:.85rem;color:var(--txt-dim);display:block}
.lightbox{position:fixed;inset:0;z-index:210;display:flex;align-items:center;justify-content:center;padding:24px}
.lightbox[hidden]{display:none}
.lb-mask{position:absolute;inset:0;background:rgba(3,6,12,.9);backdrop-filter:blur(8px)}
.lb-box{position:relative;max-width:min(1180px,100%);max-height:calc(100vh - 60px);display:flex;flex-direction:column;gap:12px}
.lb-box img{max-height:calc(100vh - 150px);width:auto;margin:0 auto;border-radius:12px;
  border:1px solid rgba(148,163,184,.35);background:#f7f9fc}
.lb-cap{text-align:center;color:var(--txt-dim);font-size:.88rem}
.lb-cap b{display:block;color:#fff;margin-bottom:4px}
.lb-nav{display:flex;gap:10px;justify-content:center}
body.lb-lock{overflow:hidden}

/* ---------------- Footer ---------------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(6,10,19,0),rgba(6,10,19,.75));
  padding:56px 0 30px;margin-top:0;
}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;margin-bottom:38px}
.ft-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.ft-brand img{height:24px;width:auto}
.ft-brand b{font-size:1.02rem;color:#fff}
.foot-desc{font-size:.88rem;color:var(--txt-mute);margin:0 0 16px}
.ft-badges{display:flex;flex-wrap:wrap;gap:8px}
.ft-badges span{
  font-size:.75rem;padding:4px 10px;border-radius:999px;
  border:1px solid var(--line);color:var(--txt-mute);background:rgba(148,163,184,.05);
}
.site-footer h3{font-size:.84rem;letter-spacing:1.4px;color:var(--txt-mute);margin-bottom:15px;text-transform:uppercase}
.site-footer li{margin-bottom:9px}
.site-footer li a{color:var(--txt-dim);font-size:.9rem}
.site-footer li a:hover{color:var(--cyan)}
.ft-bottom{
  border-top:1px solid var(--line);padding-top:22px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  font-size:.82rem;color:var(--txt-mute);
}
.ft-bottom p{margin:0}
.ft-note{font-size:.79rem;color:var(--txt-mute);opacity:.85;margin-top:12px;line-height:1.7}

/* ---------------- 回到顶部 ---------------- */
.to-top{
  position:fixed;right:24px;bottom:26px;width:44px;height:44px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(13,20,36,.9);border:1px solid var(--line-2);color:var(--txt-dim);
  cursor:pointer;z-index:90;opacity:0;visibility:hidden;transition:.25s;
  backdrop-filter:blur(10px);
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{color:#fff;border-color:rgba(34,211,238,.55);transform:translateY(-3px)}

/* ---------------- 404 ---------------- */
.err-wrap{padding:110px 0 90px;text-align:center}
.err-code{
  font-size:clamp(4.6rem,14vw,8.4rem);line-height:1;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;letter-spacing:2px;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:620px}
  .g-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lane{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .lane-item:nth-child(2)::after{display:none}
  .ft-grid{grid-template-columns:1fr 1fr;gap:30px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .rel-links{grid-template-columns:1fr}
}

@media (max-width:1020px){
  .doc{grid-template-columns:minmax(0,1fr);gap:22px}
  .doc-toc{position:static;max-height:none;padding:14px 16px}
  .toc-toggle{display:flex}
  .doc-toc .toc,.doc-toc .toc-title{margin-top:12px}
  .doc-toc.collapsed .toc{display:none}
  .prose{max-width:none}
}

@media (max-width:900px){
  :root{--sp-section:60px;--sp-section-sm:42px}
  .nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;margin:0;
    flex-direction:column;align-items:stretch;gap:4px;padding:18px var(--gutter) 40px;
    background:rgba(7,10,18,.97);backdrop-filter:blur(18px);
    border-top:1px solid var(--line);overflow-y:auto;
    transform:translateY(-8px);opacity:0;visibility:hidden;transition:.22s;
  }
  body.nav-open .nav{transform:none;opacity:1;visibility:visible}
  .nav a{padding:13px 14px;font-size:1rem;border-radius:11px}
  .nav-toggle{display:flex}
  .hdr-cta{display:none}
  .g-3,.g-2,.g-side,.g-side-rev,.g-asym{grid-template-columns:minmax(0,1fr)}
  .shots{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dl-hero{grid-template-columns:minmax(0,1fr)}
  .dl-hero-lead{border-right:0;border-bottom:1px solid var(--line);padding:28px 26px}
  .dl-hero-side{padding:26px;align-items:flex-start}
  .dl-modal-body{grid-template-columns:minmax(0,1fr)}
  .dl-modal-qr{border-right:0;border-bottom:1px solid var(--line)}
  .sec-head{align-items:flex-start}
  .sec-head-r{text-align:left;max-width:none}
  .cta{padding:34px 24px}
}

@media (max-width:720px){
  .files-row{grid-template-columns:minmax(0,1fr);gap:8px;padding:15px 18px}
  .timeline{padding-left:24px}
  .rel::before{left:-24px;width:12px;height:12px}

  table.stack{min-width:0}
  table.stack thead{display:none}
  table.stack,table.stack tbody{display:block;width:100%}
  table.stack tbody tr{display:block;padding:8px 16px 12px;border-bottom:1px solid var(--line)}
  table.stack tbody tr:last-child{border-bottom:0}
  table.stack tbody td{
    display:grid;grid-template-columns:92px minmax(0,1fr);gap:12px;
    padding:8px 0;border:0;align-items:start;
  }
  table.stack tbody td::before{
    content:attr(data-label);font-size:.78rem;color:var(--txt-mute);line-height:1.7;
  }
  table.stack tbody td b{word-break:break-word}
  .table-wrap{overflow:visible}
}

@media (max-width:640px){
  .shots{grid-template-columns:minmax(0,1fr)}
  .lane{grid-template-columns:minmax(0,1fr)}
  .lane-item::after{display:none}
}

@media (max-width:560px){
  :root{--gutter:16px}
  .brand-sub{display:none}
  .hero{padding:48px 0 44px}
  .hero-act .btn,.dl-hero-act .btn,.cta-act .btn{width:100%}
  .stats{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr;gap:26px}
  .steps li{padding:14px 16px 14px 56px}
  .code pre{white-space:pre-wrap;word-break:break-word}
  .dl-modal{padding:10px}
  .dl-modal-head{padding:24px 20px 16px}
  .dl-modal-qr,.dl-modal-act{padding:22px 20px}
  .dl-modal-foot{padding:14px 20px 18px}
  .qr-card--lg img{width:184px;height:184px}
  .card{padding:20px}
  .to-top{right:14px;bottom:16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}