/* ================================================================
   NoiiVisual · style.css v2.0
   视觉导航地图 / 选择路径中心 — 完整样式
   ================================================================ */

/* ── 1. Design Tokens ──────────────────────────────────────── */
:root {
  /* Core palette */
  --ink:        #10143A;
  --ink-2:      #1E2260;
  --primary:    #2558EF;
  --primary-lt: #EEF3FF;
  --cyan:       #00C9E8;
  --emerald:    #00D68F;
  --amber:      #FF9500;
  --rose:       #FF4757;
  --violet:     #7C5CFC;

  /* Surfaces */
  --bg:         #F5F6FA;
  --bg-2:       #FFFFFF;
  --bg-dark:    #10143A;
  --bg-dark-2:  #0A0E27;
  --bg-section: #F0F2FA;

  /* Text */
  --tx:         #10143A;
  --tx-2:       #3D4270;
  --tx-3:       #7A7FA8;
  --tx-inv:     #FFFFFF;
  --tx-inv-2:   rgba(255,255,255,0.65);
  --tx-inv-3:   rgba(255,255,255,0.35);

  /* Borders */
  --br:         #DEE2F5;
  --br-2:       #EAECF8;

  /* Shadows */
  --sh-xs: 0 1px 3px rgba(16,20,58,.06);
  --sh-sm: 0 2px 8px rgba(16,20,58,.08);
  --sh-md: 0 6px 20px rgba(16,20,58,.10);
  --sh-lg: 0 12px 40px rgba(16,20,58,.14);
  --sh-color: 0 8px 24px rgba(37,88,239,.25);

  /* Zone accent colors (one per content zone) */
  --z-obtain:   #2558EF;
  --z-typemap:  #7C5CFC;
  --z-profiles: #00C9E8;
  --z-matrix:   #00D68F;
  --z-terms:    #FF9500;
  --z-security: #FF4757;
  --z-paths:    #2558EF;
  --z-qa:       #7C5CFC;

  /* Layout */
  --nav-h:   62px;
  --wrap:    1180px;
  --sect-y:  96px;
  --r-sm:    6px;
  --r-md:    12px;
  --r-lg:    20px;
  --r-xl:    28px;
  --r-pill:  999px;

  /* Font */
  --font: 'PingFang SC','Microsoft YaHei UI','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
}

/* ── 2. Reset ──────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--tx);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:var(--font)}

/* ── 3. Layout ─────────────────────────────────────────────── */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.section{padding:var(--sect-y) 0;position:relative}
.section--light{background:var(--bg-2)}
.section--muted{background:var(--bg-section)}
.section--dark{background:var(--bg-dark)}
.section--darkest{background:var(--bg-dark-2)}

/* ── 4. Scroll Reveal ──────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .5s ease,transform .5s ease}
.reveal.visible{opacity:1;transform:none}
.reveal-x{opacity:0;transform:translateX(-20px);transition:opacity .5s ease,transform .5s ease}
.reveal-x.visible{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}
.d3{transition-delay:.24s}.d4{transition-delay:.32s}
.d5{transition-delay:.40s}

/* ── 5. Progress Bar ───────────────────────────────────────── */
.pg-bar{
  position:fixed;top:var(--nav-h);left:0;
  height:2px;width:0%;
  background:linear-gradient(90deg,var(--primary),var(--cyan));
  z-index:999;transition:width .1s linear;
}

/* ── 6. Route Sidebar (desktop) ────────────────────────────── */
.route-line{
  position:fixed;
  left:16px;
  top:50%;transform:translateY(-50%);
  z-index:50;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:0;
}
.route-stop{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:0;
  cursor:pointer;
}
.route-stop-dot{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--br);
  border:2px solid var(--bg-2);
  transition:background .2s,transform .2s;
}
.route-stop.active .route-stop-dot{
  background:var(--primary);
  transform:scale(1.3);
}
.route-stop-line{
  width:2px;height:28px;
  background:var(--br);
}
.route-stop:last-child .route-stop-line{display:none}

/* ── 7. NAVIGATION ─────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;
  height:var(--nav-h);
  z-index:900;
  background:rgba(10,14,39,.94);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:background .3s,border-color .3s;
}
.nav.scrolled{
  background:rgba(255,255,255,.97);
  border-bottom-color:var(--br);
}
.nav-inner{
  height:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 28px;
  display:flex;
  align-items:center;
  gap:24px;
}
/* Logo in nav */
.nav-logo{display:flex;align-items:center;flex-shrink:0}
.nav-logo img{height:32px;width:auto}
.nav-logo .logo-dark{display:none}
.nav.scrolled .nav-logo .logo-light{display:none}
.nav.scrolled .nav-logo .logo-dark{display:block}

/* Nav items — styled as "route stops" */
.nav-stops{
  display:flex;align-items:center;gap:2px;
  flex:1;overflow-x:auto;scrollbar-width:none;
}
.nav-stops::-webkit-scrollbar{display:none}
.nav-stop{
  position:relative;
  display:flex;align-items:center;gap:5px;
  padding:6px 12px;
  font-size:13px;color:rgba(255,255,255,.55);
  border-radius:var(--r-sm);
  white-space:nowrap;
  transition:color .2s,background .2s;
}
.nav-stop .stop-num{
  font-size:9px;font-weight:700;
  color:rgba(255,255,255,.25);
  letter-spacing:.08em;
  transition:color .2s;
}
.nav-stop:hover{color:var(--tx-inv);background:rgba(255,255,255,.07)}
.nav-stop.active{color:var(--tx-inv);background:rgba(37,88,239,.25)}
.nav-stop.active .stop-num{color:var(--cyan)}
.nav.scrolled .nav-stop{color:var(--tx-3)}
.nav.scrolled .nav-stop .stop-num{color:var(--br)}
.nav.scrolled .nav-stop:hover{color:var(--tx);background:var(--bg)}
.nav.scrolled .nav-stop.active{color:var(--primary);background:var(--primary-lt)}
.nav.scrolled .nav-stop.active .stop-num{color:var(--primary)}

/* Active underline */
.nav-stop::after{
  content:'';position:absolute;
  bottom:-1px;left:12px;right:12px;
  height:2px;border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transition:transform .2s;
}
.nav-stop.active::after{transform:scaleX(1)}
.nav.scrolled .nav-stop::after{background:var(--primary)}

/* Hamburger */
.nav-ham{
  display:none;flex-direction:column;gap:5px;
  padding:6px;margin-left:auto;
}
.nav-ham span{
  display:block;width:22px;height:2px;
  background:var(--tx-inv);border-radius:2px;
  transition:transform .25s,opacity .25s;
}
.nav.scrolled .nav-ham span{background:var(--tx)}
.nav-ham.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-ham.open span:nth-child(2){opacity:0}
.nav-ham.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Mobile drawer */
.nav-drawer{
  display:none;position:fixed;
  top:var(--nav-h);left:0;right:0;bottom:0;
  background:rgba(10,14,39,.98);
  z-index:899;padding:20px 28px;
  overflow-y:auto;flex-direction:column;gap:4px;
}
.nav-drawer.open{display:flex}
.nav-drawer .nav-stop{
  font-size:15px;padding:13px 16px;
  color:rgba(255,255,255,.6);
  justify-content:flex-start;
}
.nav-drawer .nav-stop .stop-num{font-size:11px}
.nav-drawer .nav-stop::after{display:none}
.nav-drawer .nav-stop:hover,.nav-drawer .nav-stop.active{
  color:var(--tx-inv);background:rgba(255,255,255,.07);
}

/* ── 8. HERO / 导览入口 ─────────────────────────────────────── */
#start{
  background:var(--bg-dark);
  padding-top:calc(var(--nav-h) + 80px);
  padding-bottom:80px;
  overflow:hidden;
}
/* Dot grid background */
.hero-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:32px 32px;
  background-position:0 0;
}
/* Ambient glows */
.hero-glow{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 55% 60% at 75% 35%, rgba(37,88,239,.18) 0%, transparent 65%),
    radial-gradient(ellipse 40% 50% at 15% 75%, rgba(0,201,232,.12) 0%, transparent 60%);
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns:1fr 480px;
  gap:64px;align-items:center;
}

/* Hero left */
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);font-weight:700;margin-bottom:24px;
}
.hero-kicker::before{
  content:'';display:block;width:24px;height:2px;
  background:var(--cyan);border-radius:2px;
}
.hero-h1{
  font-size:clamp(30px,4.5vw,52px);
  font-weight:900;line-height:1.15;
  letter-spacing:-.025em;
  color:var(--tx-inv);
  margin-bottom:22px;
}
.hero-h1 em{font-style:normal;color:var(--cyan)}
.hero-desc{
  font-size:15.5px;color:var(--tx-inv-2);
  line-height:1.85;max-width:480px;margin-bottom:32px;
}
.hero-chips{
  display:flex;flex-wrap:wrap;gap:8px;margin-bottom:36px;
}
.hero-chip{
  font-size:12px;padding:5px 13px;
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--r-pill);
  color:rgba(255,255,255,.65);
  background:rgba(255,255,255,.04);
  transition:border-color .2s,color .2s;
}
.hero-chip:hover{border-color:rgba(0,201,232,.5);color:var(--cyan)}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-md);
  font-size:14px;font-weight:700;
  transition:transform .18s,box-shadow .18s,background .18s,opacity .18s;
}
.btn:hover{transform:translateY(-2px)}
.btn--fill{
  background:var(--primary);color:var(--tx-inv);
  box-shadow:var(--sh-color);
}
.btn--fill:hover{background:#3B6BFF;box-shadow:0 10px 28px rgba(37,88,239,.35)}
.btn--outline{
  background:transparent;color:rgba(255,255,255,.8);
  border:1.5px solid rgba(255,255,255,.2);
}
.btn--outline:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.4)}
.btn svg{width:16px;height:16px;flex-shrink:0}

/* ── Hero Map Preview (right panel) ──────────────────────── */
.map-preview{
  position:relative;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--r-xl);
  padding:28px;
}
.map-preview-title{
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--tx-inv-3);margin-bottom:20px;font-weight:600;
}
/* 3×3 node grid */
.map-nodes{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:10px;position:relative;
}
/* SVG connecting lines overlay */
.map-nodes-svg{
  position:absolute;inset:0;width:100%;height:100%;
  pointer-events:none;z-index:0;
}
.map-node{
  position:relative;z-index:1;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--r-md);
  padding:14px 12px;
  display:flex;flex-direction:column;gap:7px;
  cursor:pointer;
  transition:background .2s,border-color .2s,transform .2s;
  text-decoration:none;
}
.map-node:hover{
  background:rgba(255,255,255,.09);
  border-color:rgba(0,201,232,.4);
  transform:translateY(-1px);
}
.map-node-n{font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--cyan)}
.map-node-i{width:20px;height:20px;opacity:.5;filter:brightness(0) invert(1)}
.map-node-l{font-size:12px;color:rgba(255,255,255,.75);font-weight:500;line-height:1.3}
/* Zone-colored left micro-bar */
.map-node::before{
  content:'';position:absolute;
  left:0;top:20%;bottom:20%;
  width:2px;border-radius:0 2px 2px 0;
  opacity:.5;
}
.map-node[data-zone="obtain"]::before{background:var(--z-obtain)}
.map-node[data-zone="typemap"]::before{background:var(--z-typemap)}
.map-node[data-zone="profiles"]::before{background:var(--z-profiles)}
.map-node[data-zone="matrix"]::before{background:var(--z-matrix)}
.map-node[data-zone="terms"]::before{background:var(--z-terms)}
.map-node[data-zone="security"]::before{background:var(--z-security)}
.map-node[data-zone="paths"]::before{background:var(--z-paths)}
.map-node[data-zone="qa"]::before{background:var(--z-qa)}

/* ── 9. SECTION ANATOMY (shared) ──────────────────────────── */
/* Zone label row */
.zone-row{
  display:flex;align-items:center;gap:12px;
  margin-bottom:18px;
}
.zone-badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  font-weight:700;padding:4px 11px;border-radius:var(--r-pill);
  background:var(--primary-lt);color:var(--primary);
}
.zone-badge img{width:13px;height:13px}
/* Badge variants */
.zb-violet{background:rgba(124,92,252,.1);color:var(--violet)}
.zb-cyan{background:rgba(0,201,232,.1);color:#009AB5}
.zb-emerald{background:rgba(0,214,143,.1);color:#008C5A}
.zb-amber{background:rgba(255,149,0,.1);color:#CC7700}
.zb-rose{background:rgba(255,71,87,.1);color:var(--rose)}
.zone-coord{font-size:11.5px;color:var(--tx-3);letter-spacing:.04em}
.section--dark .zone-coord{color:var(--tx-inv-3)}

/* Section heading */
.sect-hd{margin-bottom:48px}
.sect-hd h2{
  font-size:clamp(22px,3vw,34px);
  font-weight:800;line-height:1.25;
  letter-spacing:-.02em;
  color:var(--tx);
}
.section--dark .sect-hd h2{color:var(--tx-inv)}
.section--darkest .sect-hd h2{color:var(--tx-inv)}
.sect-hd p{
  margin-top:12px;font-size:15px;
  color:var(--tx-3);line-height:1.8;
  max-width:620px;
}
.section--dark .sect-hd p{color:var(--tx-inv-2)}
.section--darkest .sect-hd p{color:var(--tx-inv-2)}
.sect-hd--center{text-align:center}
.sect-hd--center p{margin-left:auto;margin-right:auto}

/* ── 10. SECTION: 获取通道 ────────────────────────────────── */
#channels{background:var(--bg-2)}
/* Horizontal flow path */
.channel-path{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;
  position:relative;
}
/* Connecting arrows between cards */
.channel-path::before{
  content:'';
  position:absolute;
  top:52px;left:calc(25% - 20px);right:calc(25% - 20px);
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--cyan));
  opacity:.25;z-index:0;
}
.channel-card{
  position:relative;z-index:1;
  background:var(--bg);
  border:1px solid var(--br-2);
  border-radius:var(--r-lg);
  padding:28px 22px;
  margin:0 8px;
  transition:box-shadow .22s,transform .22s;
}
.channel-card:hover{box-shadow:var(--sh-md);transform:translateY(-3px)}
/* Zone accent top bar per channel */
.channel-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--primary);border-radius:var(--r-lg) var(--r-lg) 0 0}
.channel-card:nth-child(2)::before{background:var(--violet)}
.channel-card:nth-child(3)::before{background:var(--cyan)}
.channel-card:nth-child(4)::before{background:var(--emerald)}

.ch-step{
  display:inline-block;
  font-size:11px;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;color:var(--primary);
  background:var(--primary-lt);
  padding:3px 9px;border-radius:var(--r-pill);
  margin-bottom:16px;
}
.channel-card:nth-child(2) .ch-step{color:var(--violet);background:rgba(124,92,252,.1)}
.channel-card:nth-child(3) .ch-step{color:#009AB5;background:rgba(0,201,232,.1)}
.channel-card:nth-child(4) .ch-step{color:#008C5A;background:rgba(0,214,143,.1)}

.ch-icon{
  width:44px;height:44px;
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-lt);
  margin-bottom:16px;
  color:var(--primary);
}
.ch-icon img{width:22px;height:22px}
.channel-card:nth-child(2) .ch-icon{background:rgba(124,92,252,.1);color:var(--violet)}
.channel-card:nth-child(3) .ch-icon{background:rgba(0,201,232,.1)}
.channel-card:nth-child(4) .ch-icon{background:rgba(0,214,143,.1)}

.ch-title{font-size:15px;font-weight:700;color:var(--tx);margin-bottom:10px}
.ch-desc{font-size:13px;color:var(--tx-3);line-height:1.75;margin-bottom:14px}
.ch-tags{display:flex;flex-wrap:wrap;gap:5px}
.ch-tag{
  font-size:11px;padding:3px 8px;
  background:var(--bg-2);border:1px solid var(--br);
  border-radius:4px;color:var(--tx-2);
}
/* ── 11. SECTION: 类型图谱 ───────────────────────────────── */
#typemap{background:var(--bg-section)}
.typemap-layout{
  display:grid;
  grid-template-columns:340px 1fr;
  gap:56px;align-items:start;
}
.typemap-sticky{
  position:sticky;top:calc(var(--nav-h) + 28px);
}
.typemap-img{
  border-radius:var(--r-xl);overflow:hidden;
  aspect-ratio:3/4;background:var(--br-2);
  border:1px solid var(--br);
}
.typemap-img img{
  width:100%;height:100%;
  object-fit:contain;padding:20px;
}
.typemap-caption{
  margin-top:12px;font-size:12.5px;
  color:var(--tx-3);text-align:center;
}
/* Type node cards */
.type-nodes{display:flex;flex-direction:column;gap:14px}
.type-node{
  display:grid;grid-template-columns:4px 1fr;
  border-radius:var(--r-lg);
  border:1px solid var(--br-2);
  background:var(--bg-2);
  overflow:hidden;
  transition:box-shadow .2s;
}
.type-node:hover{box-shadow:var(--sh-sm)}
.type-node-bar{background:var(--primary)}
.type-node:nth-child(2) .type-node-bar{background:var(--violet)}
.type-node:nth-child(3) .type-node-bar{background:var(--cyan)}
.type-node:nth-child(4) .type-node-bar{background:var(--emerald)}
.type-node:nth-child(5) .type-node-bar{background:var(--amber)}
.type-node-body{padding:20px 22px}
.type-node-head{
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;
}
.type-node-icon{
  width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-lt);flex-shrink:0;
}
.type-node-icon img{width:16px;height:16px}
.type-node:nth-child(2) .type-node-icon{background:rgba(124,92,252,.1)}
.type-node:nth-child(3) .type-node-icon{background:rgba(0,201,232,.1)}
.type-node:nth-child(4) .type-node-icon{background:rgba(0,214,143,.1)}
.type-node:nth-child(5) .type-node-icon{background:rgba(255,149,0,.1)}
.type-name{font-size:15px;font-weight:700;color:var(--tx)}
.type-eng{font-size:12px;color:var(--tx-3);margin-left:4px;font-weight:400}
.type-desc{font-size:13.5px;color:var(--tx-2);line-height:1.75;margin-bottom:10px}
.type-scope{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--tx-3);
}
.type-scope-label{
  font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  padding:2px 7px;border-radius:3px;
  background:var(--bg);color:var(--tx-3);
}

/* ── 12. SECTION: 品牌档案 ───────────────────────────────── */
#profiles{background:var(--bg-2)}
.profiles-note{
  display:flex;gap:10px;align-items:flex-start;
  font-size:13px;color:var(--tx-3);
  background:var(--bg-section);
  border:1px solid var(--br);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:13px 16px;margin-bottom:44px;
}
.profiles-note::before{
  content:'ℹ';font-size:15px;color:var(--primary);flex-shrink:0;margin-top:-1px;
}
/* Feature card grid: Ledger wide, then 2+2 */
.brand-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-rows:auto auto auto;
  gap:24px;
}
.brand-card{
  border:1px solid var(--br-2);border-radius:var(--r-xl);
  overflow:hidden;background:var(--bg);
  transition:box-shadow .22s,transform .22s;
}
.brand-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
/* Ledger: spans full width */
.brand-card--ledger{
  grid-column:1 / -1;
  display:grid;grid-template-columns:300px 1fr;
}
.brand-card--ledger .brand-img{min-height:240px;aspect-ratio:auto}
/* Image wrapper */
.brand-img{
  background:var(--br-2);
  aspect-ratio:16/9;
  overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.brand-img img{
  width:100%;height:100%;
  object-fit:contain;padding:16px;
}
/* Body */
.brand-body{padding:24px 26px}
.brand-top{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:12px;margin-bottom:18px;
}
.brand-name{font-size:19px;font-weight:900;color:var(--tx)}
.brand-badge{
  font-size:11px;font-weight:700;
  padding:4px 11px;border-radius:var(--r-pill);
  white-space:nowrap;flex-shrink:0;
}
.bb-hw{background:rgba(124,92,252,.1);color:var(--violet)}
.bb-hot{background:rgba(0,201,232,.1);color:#009AB5}
.bb-btc{background:rgba(255,149,0,.1);color:var(--amber)}
.bb-multi{background:rgba(0,214,143,.1);color:#008C5A}
/* Brand rows grid */
.brand-rows{
  display:grid;grid-template-columns:1fr 1fr;
  gap:12px 20px;
}
.brand-row-label{
  font-size:11px;text-transform:uppercase;letter-spacing:.09em;
  color:var(--tx-3);margin-bottom:3px;font-weight:600;
}
.brand-row-val{font-size:13px;color:var(--tx-2);line-height:1.55}

/* ── 13. SECTION: 功能矩阵 ───────────────────────────────── */
#matrix{background:var(--bg-section)}
.matrix-note{
  font-size:12.5px;color:var(--tx-3);
  background:var(--bg-2);border:1px solid var(--br);
  border-radius:var(--r-md);padding:11px 16px;
  margin-bottom:32px;
}
.matrix-wrap{
  border-radius:var(--r-lg);
  border:1px solid var(--br);
  background:var(--bg-2);
  overflow:auto;
}
.matrix-table{width:100%;border-collapse:collapse;min-width:680px}
.matrix-table thead tr{background:var(--bg-dark)}
.matrix-table th{
  padding:14px 16px;text-align:center;
  font-size:13px;font-weight:700;
  color:rgba(255,255,255,.8);white-space:nowrap;
}
.matrix-table th:first-child{
  text-align:left;color:var(--tx-inv-3);
  font-weight:400;min-width:180px;
}
.matrix-table tbody tr{
  border-bottom:1px solid var(--br-2);
  transition:background .15s;
}
.matrix-table tbody tr:last-child{border-bottom:none}
.matrix-table tbody tr:hover{background:var(--bg)}
.matrix-table td{
  padding:13px 16px;font-size:13.5px;
  text-align:center;color:var(--tx-3);
}
.matrix-table td:first-child{
  text-align:left;color:var(--tx-2);
  font-weight:500;padding-left:22px;
}
/* Check cells */
.cy,.cn{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%}
.cy{background:rgba(0,214,143,.12);color:#008C5A;font-size:12px;font-weight:700}
.cn{background:var(--bg);color:var(--tx-3);font-size:11px}
.cp{
  display:inline-block;font-size:11px;
  padding:2px 8px;border-radius:4px;
  background:rgba(255,149,0,.1);color:var(--amber);
  white-space:nowrap;
}

/* ── 14. SECTION: 终端适配 ───────────────────────────────── */
#terminals{background:var(--bg-2)}
.terminals-layout{
  display:grid;grid-template-columns:1fr 420px;
  gap:52px;align-items:start;
}
.terminal-cards{display:flex;flex-direction:column;gap:14px}
.terminal-card{
  display:grid;grid-template-columns:52px 1fr;
  gap:0;border:1px solid var(--br-2);
  border-radius:var(--r-lg);background:var(--bg-section);
  overflow:hidden;transition:box-shadow .2s;
}
.terminal-card:hover{box-shadow:var(--sh-sm)}
.terminal-icon-col{
  background:var(--primary-lt);
  display:flex;align-items:center;justify-content:center;
  padding:0 14px;
}
.terminal-icon-col img{width:22px;height:22px}
.terminal-body{padding:18px 20px}
.terminal-name{font-size:14px;font-weight:700;color:var(--tx);margin-bottom:6px}
.terminal-desc{font-size:13px;color:var(--tx-3);line-height:1.7}
/* right image */
.terminal-img-wrap{
  border-radius:var(--r-xl);overflow:hidden;
  position:sticky;top:calc(var(--nav-h) + 28px);
  aspect-ratio:4/5;background:var(--br-2);
  border:1px solid var(--br);
}
.terminal-img-wrap img{
  width:100%;height:100%;
  object-fit:contain;padding:20px;
}

/* ── 15. SECTION: 安全清单 ───────────────────────────────── */
#checklist{
  background:#0E0B25;
  position:relative;overflow:hidden;
}
/* red ambient */
#checklist::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 50% 60% at 90% 20%, rgba(255,71,87,.1) 0%, transparent 60%),
             radial-gradient(ellipse 40% 40% at 10% 80%, rgba(124,92,252,.1) 0%, transparent 60%);
  pointer-events:none;
}
.checklist-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:16px;position:relative;z-index:1;
}
.check-card{
  display:flex;gap:18px;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-lg);
  padding:22px 20px;
  transition:background .2s;
}
.check-card:hover{background:rgba(255,255,255,.06)}
.check-num{
  width:34px;height:34px;flex-shrink:0;
  border-radius:50%;
  background:rgba(255,71,87,.15);
  border:1.5px solid rgba(255,71,87,.35);
  color:var(--rose);
  font-size:13px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.check-title{
  font-size:14.5px;font-weight:700;
  color:var(--tx-inv);margin-bottom:8px;
}
.check-desc{
  font-size:13px;color:rgba(255,255,255,.5);
  line-height:1.75;
}
/* highlight card (last card wide) */
.check-card--wide{
  grid-column:1/-1;
  background:rgba(37,88,239,.12);
  border-color:rgba(37,88,239,.3);
}
.check-card--wide .check-num{
  background:rgba(37,88,239,.2);
  border-color:rgba(37,88,239,.5);
  color:var(--cyan);
}
.check-card--wide .check-title{color:var(--cyan)}
/* Security image band */
.security-img{
  margin-top:40px;position:relative;z-index:1;
  border-radius:var(--r-xl);overflow:hidden;
  max-height:240px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.07);
}
.security-img img{
  width:100%;height:100%;
  object-fit:contain;padding:20px;
}

/* ── 16. SECTION: 路径选择 ───────────────────────────────── */
#pathways{background:var(--bg-2)}
.pathways-layout{
  display:grid;grid-template-columns:380px 1fr;
  gap:52px;align-items:start;
}
.pathways-img{
  border-radius:var(--r-xl);overflow:hidden;
  position:sticky;top:calc(var(--nav-h) + 28px);
  aspect-ratio:3/4;background:var(--br-2);
  border:1px solid var(--br);
}
.pathways-img img{
  width:100%;height:100%;
  object-fit:contain;padding:20px;
}
.pathway-cards{display:flex;flex-direction:column;gap:16px}
.pathway-card{
  border:1px solid var(--br-2);
  border-radius:var(--r-lg);
  background:var(--bg);
  padding:22px 24px;
  position:relative;overflow:hidden;
  transition:box-shadow .22s,transform .22s;
}
.pathway-card:hover{box-shadow:var(--sh-md);transform:translateX(4px)}
.pw-num{
  position:absolute;top:18px;right:20px;
  font-size:40px;font-weight:900;
  color:var(--br-2);line-height:1;
  user-select:none;
}
.pw-title{
  font-size:14.5px;font-weight:700;
  color:var(--tx);margin-bottom:10px;
  padding-right:50px;
}
.pw-body{font-size:13px;color:var(--tx-3);line-height:1.75;margin-bottom:12px}
.pw-tip{
  font-size:12.5px;color:var(--primary);
  background:var(--primary-lt);
  border-left:3px solid var(--primary);
  padding:9px 13px;border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.pw-tip strong{font-weight:700}

/* ── 17. SECTION: 答疑站 ─────────────────────────────────── */
#station{background:var(--bg-section)}
.qa-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.qa-item{
  background:var(--bg-2);border:1px solid var(--br-2);
  border-radius:var(--r-lg);overflow:hidden;
  transition:box-shadow .2s;
}
.qa-item.open{box-shadow:var(--sh-sm);border-color:rgba(37,88,239,.3)}
.qa-q{
  display:flex;align-items:flex-start;gap:14px;
  padding:20px 22px;cursor:pointer;user-select:none;
}
.qa-qnum{
  width:28px;height:28px;flex-shrink:0;
  border-radius:50%;background:var(--primary);
  color:var(--tx-inv);font-size:12px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  margin-top:1px;transition:background .2s;
}
.qa-item.open .qa-qnum{background:var(--cyan)}
.qa-qtext{
  flex:1;font-size:14.5px;font-weight:600;
  color:var(--tx);line-height:1.5;
}
.qa-icon{
  flex-shrink:0;width:22px;height:22px;
  color:var(--tx-3);margin-top:1px;
  transition:transform .25s,color .2s;
}
.qa-item.open .qa-icon{transform:rotate(45deg);color:var(--primary)}
.qa-icon svg{width:100%;height:100%}
.qa-a{
  padding:0 22px 20px 64px;
  font-size:13.5px;color:var(--tx-2);
  line-height:1.85;display:none;
}
.qa-item.open .qa-a{display:block}

/* ── 18. SECTION: 站点说明 / Footer ──────────────────────── */
#about{background:var(--bg-dark)}
.about-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;
  gap:60px;
}
.about-brand img{height:34px;width:auto;margin-bottom:20px}
.about-intro{
  font-size:13.5px;color:var(--tx-inv-2);
  line-height:1.85;margin-bottom:22px;max-width:360px;
}
.about-disclaimer{
  font-size:12px;color:var(--tx-inv-3);
  line-height:1.75;padding:13px 16px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-md);
  background:rgba(255,255,255,.02);
}
.about-col-h{
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--tx-inv-3);font-weight:700;margin-bottom:18px;
}
.about-links{display:flex;flex-direction:column;gap:10px}
.about-link{
  font-size:13.5px;color:var(--tx-inv-2);
  display:flex;align-items:center;gap:8px;
  transition:color .15s;
}
.about-link:hover{color:var(--tx-inv)}
.about-link img{
  width:14px;height:14px;
  filter:brightness(0) invert(1);opacity:.4;
}
.about-bottom{
  margin-top:52px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--tx-inv-3);
  flex-wrap:wrap;gap:12px;
}
.about-bottom a{color:var(--tx-inv-3);transition:color .15s}
.about-bottom a:hover{color:var(--tx-inv-2)}

/* ── 20. RESPONSIVE ────────────────────────────────────────── */
@media(max-width:1100px){
  :root{--wrap:960px;--sect-y:80px}
  .hero-inner{grid-template-columns:1fr 380px;gap:48px}
  .about-grid{grid-template-columns:1fr 1fr;gap:40px}
  .about-grid>:first-child{grid-column:1/-1}
  .brand-card--ledger{grid-template-columns:240px 1fr}
}

@media(max-width:900px){
  :root{--nav-h:56px;--sect-y:64px}
  .route-line{display:none}
  .nav-stops{display:none}
  .nav-ham{display:flex}
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .map-preview{display:block}
  .map-nodes{grid-template-columns:repeat(3,1fr)}
  .channel-path{grid-template-columns:1fr 1fr;gap:16px}
  .channel-path::before{display:none}
  .typemap-layout{grid-template-columns:1fr}
  .typemap-sticky{position:static}
  .typemap-img{aspect-ratio:16/9}
  .brand-card--ledger{grid-column:1;display:block}
  .brand-card--ledger .brand-img{aspect-ratio:16/9;min-height:auto}
  .brand-grid{grid-template-columns:1fr}
  .terminals-layout{grid-template-columns:1fr}
  .terminal-img-wrap{position:static;aspect-ratio:16/9}
  .checklist-grid{grid-template-columns:1fr}
  .check-card--wide{grid-column:1}
  .pathways-layout{grid-template-columns:1fr}
  .pathways-img{position:static;aspect-ratio:16/9}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .about-grid>:first-child{grid-column:1}
}

@media(max-width:600px){
  :root{--sect-y:52px}
  .channel-path{grid-template-columns:1fr}
  .hero-btns .btn{width:100%;justify-content:center}
  .hero-btns{flex-direction:column}
  .map-nodes{grid-template-columns:repeat(3,1fr)}
  .brand-rows{grid-template-columns:1fr}
  .about-bottom{flex-direction:column;text-align:center}
}