/* ==========================================================================
   VPNYF — 基础层
   雾紫蓝纸面 / 漂浮白卡 / 蜜金工艺
   令牌 → 重置 → 排版 → 布局 → 按钮 → 头部 → 首屏装置 → 页脚 → 卡片 → 揭示 → 无障碍
   ========================================================================== */

:root{
  /* ---- 基底与面板（三级分层） ---- */
  --bg:#E9EEFA;
  --bg-2:#F2F5FD;
  --bg-panel:#F9FBFF;
  --bg-panel-2:#DCE4F5;
  --bg-panel-3:#F1F5FC;
  --bg-sunk:#E3E9F7;
  --border:#CBD6EC;
  --border-soft:#DEE6F4;

  /* ---- 文字 ---- */
  --text:#171E36;
  --text-muted:#5A6484;
  --text-faint:#7C86A4;
  --on-dark:#F9FBFF;
  --on-dark-muted:#C6D0E8;
  --on-dark-line:rgba(249,251,255,.20);

  /* ---- 强调（蜜金） ---- */
  --accent:#C97A1E;
  --accent-dark:#9A5A10;
  --accent-soft:rgba(201,122,30,.12);
  --accent-soft-2:rgba(201,122,30,.18);
  --accent-soft-0:rgba(201,122,30,0);
  --accent-wash:#F7EBD9;
  --accent-line:#E8CFA9;

  /* ---- 语义色 ---- */
  --success:#17875A;
  --success-wash:rgba(23,135,90,.10);
  --success-line:rgba(23,135,90,.28);
  --warn:#C2410C;
  --warn-wash:rgba(194,65,12,.10);
  --warn-line:rgba(194,65,12,.28);
  --error:#B3261E;

  /* ---- 糖果色底板（只用于图标底板） ---- */
  --candy-mint:#CFEEE1;
  --candy-mint-ink:#17875A;
  --candy-pink:#F8D8E3;
  --candy-pink-ink:#B3261E;
  --candy-cream:#F6E7C9;
  --candy-cream-ink:#9A5A10;
  --candy-sky:#D5E4F9;
  --candy-sky-ink:#2E5590;

  /* ---- 线路类型 chip ---- */
  --chip-iepl-bg:#F7EBD9;
  --chip-iepl-ink:#9A5A10;
  --chip-relay-bg:#DCE8F9;
  --chip-relay-ink:#2E5590;
  --chip-direct-bg:#D8EFE4;
  --chip-direct-ink:#17875A;

  /* ---- 窗口 chrome 三色点 ---- */
  --dot-red:#E4786F;
  --dot-gold:#E8B84B;
  --dot-green:#69C08E;

  /* ---- 光晕与底纹 ---- */
  --glow-warm:rgba(201,122,30,.16);
  --glow-cool:rgba(96,124,196,.17);
  --glow-soft:rgba(255,255,255,.92);
  --glow-warm-0:rgba(201,122,30,0);
  --glow-cool-0:rgba(96,124,196,0);
  --glow-soft-0:rgba(255,255,255,0);
  --dot:rgba(23,30,54,.055);
  --dot-0:rgba(23,30,54,0);
  --veil:rgba(23,30,54,.42);
  --bg-2-0:rgba(242,245,253,0);

  /* ---- 阴影 ---- */
  --shadow-card:0 18px 40px -20px rgba(201,122,30,.30), 0 2px 6px rgba(23,30,54,.05);
  --shadow-soft:0 6px 16px -10px rgba(23,30,54,.22);
  --shadow-float:0 26px 56px -24px rgba(23,30,54,.32), 0 1px 0 rgba(255,255,255,.9) inset;
  --shadow-device:0 36px 80px -34px rgba(23,30,54,.36), 0 1px 0 rgba(255,255,255,.95) inset;
  --shadow-btn:0 10px 22px -12px rgba(23,30,54,.55);
  --shadow-btn-hi:0 16px 30px -14px rgba(23,30,54,.62);
  --shadow-row:0 3px 10px -8px rgba(23,30,54,.30);
  --shadow-pill:0 4px 12px -8px rgba(23,30,54,.28);
  --shadow-menu:0 20px 44px -22px rgba(23,30,54,.38), 0 1px 0 rgba(255,255,255,.9) inset;
  --shadow-base:0 26px 56px -30px rgba(201,122,30,.18), 0 1px 0 rgba(255,255,255,.95) inset;
  --shadow-logo:0 5px 10px rgba(35,47,114,.28);

  /* ---- 按钮渐变 ---- */
  --btn-a:#252F4F;
  --btn-b:#171E36;

  /* ---- 头部 ---- */
  --head-bg:rgba(249,251,255,.78);
  --nav-hover:rgba(23,30,54,.055);

  /* ---- 旗帜填充 ---- */
  --flag-red:#C8382F;
  --flag-blue:#2C3E7A;
  --flag-white:#FFFFFF;
  --flag-gold:#E3B23C;
  --flag-green:#1F7A4C;
  --flag-ink:#1B1B1B;
  --flag-line:rgba(23,30,54,.16);

  /* ---- 圆角 ---- */
  --r-xs:6px;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --r-pill:999px;

  /* ---- 字体 ---- */
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* ---- 布局 ---- */
  --gutter:28px;
  --maxw:1240px;
  --maxw-narrow:920px;
  --head-h:60px;
  --sec-y:76px;

  /* ---- 焦点 ---- */
  --focus:#2E5590;
}

/* ==========================================================================
   重置
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--head-h) + 16px);
}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.6;
  color:var(--text);
  background:var(--bg-2);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg,video,canvas{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
::selection{background:var(--accent-soft-2);color:var(--text)}

/* ==========================================================================
   排版
   ========================================================================== */
h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-display);
  color:var(--text);
  font-weight:900;
  line-height:1.18;
  letter-spacing:-.022em;
}
h1{font-size:clamp(34px,4.6vw,52px)}
h2{font-size:clamp(25px,2.9vw,34px);font-weight:800;line-height:1.24;letter-spacing:-.02em}
h3{font-size:20px;font-weight:700;line-height:1.38;letter-spacing:-.012em}
h4{font-size:16px;font-weight:700;line-height:1.45;letter-spacing:-.006em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
strong,b{font-weight:700}
small{font-size:12.5px}
hr{border:0;border-top:1px solid var(--border);margin:28px 0}
blockquote{margin:0 0 1.2em;padding:14px 18px;border-left:3px solid var(--accent-line);background:var(--bg-panel-3);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-muted)}

code,kbd,samp{font-family:var(--font-mono);font-size:.92em}
:not(pre) > code{
  background:var(--bg-panel-2);
  color:var(--text);
  padding:.12em .4em;
  border-radius:var(--r-xs);
  overflow-wrap:anywhere;
  word-break:break-word;
}
pre{
  margin:0 0 1.2em;
  padding:16px 18px;
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-soft);
  font-size:13px;
  line-height:1.7;
}
pre code{background:none;padding:0;white-space:pre;overflow-wrap:normal;color:var(--text)}

/* ==========================================================================
   布局工具
   ========================================================================== */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.wrap-narrow{max-width:var(--maxw-narrow)}
.sec{padding-top:var(--sec-y);padding-bottom:var(--sec-y)}
.sec-tight{padding-top:calc(var(--sec-y) * .58);padding-bottom:calc(var(--sec-y) * .58)}
.sec-head{
  max-width:760px;
  margin-left:auto;
  margin-right:auto;
  margin-bottom:40px;
  text-align:center;
}
.sec-head p{
  margin:14px auto 0;
  max-width:62ch;
  font-size:15.5px;
  line-height:1.75;
  color:var(--text-muted);
}
.sec-head-left{margin-left:0;text-align:left}
.sec-head-left p{margin-left:0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.no-break{white-space:nowrap}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:var(--accent-wash);
  border:1px solid var(--accent-line);
  color:var(--accent-dark);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
  max-width:100%;
  overflow:hidden;
  text-overflow:ellipsis;
}
.lead{font-size:17px;line-height:1.75;color:var(--text-muted)}
.muted{color:var(--text-muted)}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding-left:26px;
  padding-right:26px;
  border:1px solid transparent;
  border-radius:var(--r-md);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn svg{flex:none}
.btn-primary{
  background:linear-gradient(180deg,var(--btn-a),var(--btn-b));
  color:var(--on-dark);
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-btn-hi)}
.btn-primary svg{transition:transform .18s ease}
.btn-primary:hover svg{transform:translateX(3px)}
.btn-ghost{
  background:var(--bg-panel);
  color:var(--text);
  border-color:var(--border);
  box-shadow:var(--shadow-soft);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent-line)}
.btn-secondary{
  flex-shrink:0;
  white-space:nowrap;
  background:var(--bg-panel-2);
  color:var(--text);
  border-color:var(--border);
}
.btn-secondary:hover{transform:translateY(-2px);background:var(--bg-panel-3)}
.btn-sm{height:38px;padding-left:16px;padding-right:16px;font-size:13.5px;border-radius:var(--r-sm)}
.btn-block{width:100%}
.btn.is-disabled,.btn[disabled]{opacity:.55;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

/* ==========================================================================
   头部
   ========================================================================== */
.site-head{
  position:relative;
  z-index:30;
  background:var(--head-bg);
  border-bottom:1px solid var(--border-soft);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.head-inner{
  max-width:var(--maxw);
  margin:0 auto;
  height:var(--head-h);
  padding-left:var(--gutter);
  padding-right:var(--gutter);
  display:flex;
  align-items:center;
  gap:22px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand-mark{width:30px;height:30px;flex:none;filter:drop-shadow(var(--shadow-logo))}
.brand-text{display:flex;align-items:baseline;gap:7px;min-width:0}
.brand-en{
  font-family:var(--font-display);
  font-weight:800;
  font-size:17px;
  letter-spacing:-.015em;
  color:var(--text);
  white-space:nowrap;
}
.brand-zh{font-size:12.5px;font-weight:500;color:var(--text-muted);letter-spacing:.02em;white-space:nowrap}

.nav{
  margin-left:auto;
  min-width:0;
  display:flex;
  align-items:center;
  gap:2px;
}
.nav a{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  padding:8px 11px;
  border-radius:var(--r-sm);
  color:var(--text-muted);
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
  transition:color .18s ease, background .18s ease;
}
.nav a:hover{color:var(--text);background:var(--nav-hover)}
.nav a.is-active{color:var(--text);font-weight:700}

.head-right{display:flex;align-items:center;gap:10px;flex:none;padding-left:6px}

/* ---- 语言切换 ---- */
.lang{position:relative;flex:none}
.lang-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  height:34px;
  padding-left:11px;
  padding-right:10px;
  border-radius:var(--r-pill);
  border:1px solid var(--border);
  background:var(--bg-panel);
  color:var(--text-muted);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  box-shadow:var(--shadow-pill);
  transition:color .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.lang-btn:hover{color:var(--text);border-color:var(--accent-line);box-shadow:var(--shadow-soft)}
.lang-globe{flex:none;color:var(--accent-dark);opacity:.9}
.lang-current{white-space:nowrap;line-height:1}
.lang-caret{flex:none;transition:transform .18s ease;opacity:.75}
.lang-btn[aria-expanded="true"] .lang-caret{transform:rotate(180deg)}
.lang-menu{
  position:absolute;
  right:0;
  top:calc(100% + 8px);
  min-width:196px;
  margin:0;
  padding:6px;
  list-style:none;
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-menu);
  display:none;
  z-index:40;
}
.lang.is-open .lang-menu{display:block}
.lang-menu a{
  display:flex;
  align-items:center;
  gap:9px;
  width:100%;
  min-height:40px;
  padding:8px 10px;
  border-radius:var(--r-sm);
  color:var(--text);
  font-size:13.5px;
  font-weight:500;
  transition:background .16s ease, color .16s ease;
}
.lang-menu a:hover{background:var(--bg-panel-2)}
.lang-code{
  flex:none;
  min-width:34px;
  padding:2px 6px;
  border-radius:var(--r-xs);
  background:var(--bg-panel-2);
  color:var(--text-muted);
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:700;
  text-align:center;
  letter-spacing:.02em;
}
.lang-name{flex:1;min-width:0;white-space:nowrap}
.lang-check{flex:none;color:var(--accent-dark);opacity:0}
.lang-menu a.is-current,
.lang-menu a.is-active{background:var(--accent-wash);color:var(--accent-dark);font-weight:700}
.lang-menu a.is-current .lang-code,
.lang-menu a.is-active .lang-code{background:var(--accent-soft-2);color:var(--accent-dark)}
.lang-menu a.is-current .lang-check,
.lang-menu a.is-active .lang-check{opacity:1}

.btn-login{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:34px;
  padding-left:17px;
  padding-right:17px;
  border-radius:var(--r-sm);
  background:linear-gradient(180deg,var(--btn-a),var(--btn-b));
  color:var(--on-dark);
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
  box-shadow:var(--shadow-btn);
  transition:transform .18s ease, box-shadow .18s ease;
}
.btn-login:hover{transform:translateY(-1px);box-shadow:var(--shadow-btn-hi)}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  min-width:44px;
  min-height:44px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:0;
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  background:var(--bg-panel);
  cursor:pointer;
  flex:none;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s ease, opacity .2s ease;
}
html.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
html.nav-open .nav-toggle span:nth-child(2){opacity:0}
html.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---- 移动抽屉 ---- */
.drawer{
  display:none;
  position:absolute;
  top:100%;
  left:0;
  right:0;
  z-index:35;
  padding:10px var(--gutter) 18px;
  background:var(--bg-panel);
  border-bottom:1px solid var(--border);
  box-shadow:var(--shadow-float);
  max-height:calc(100dvh - var(--head-h));
  overflow-y:auto;
  overscroll-behavior:contain;
}
html.nav-open .drawer{display:block}
html.nav-open{overflow:hidden}
.drawer ul{margin:0;padding:0;list-style:none}
.drawer a{
  display:flex;
  width:100%;
  align-items:center;
  min-height:48px;
  padding:12px;
  border-radius:var(--r-sm);
  color:var(--text);
  font-size:15px;
  font-weight:600;
}
.drawer a:hover,.drawer a.is-active{background:var(--bg-panel-2)}
.drawer-sep{height:1px;background:var(--border-soft);margin:10px 0}
.drawer-label{
  margin:0;
  padding:6px 12px;
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--text-muted);
}
.drawer-langs a{font-weight:500;font-size:14px;color:var(--text-muted);min-height:44px}
.drawer-langs a.is-active{color:var(--accent-dark);font-weight:700;background:var(--accent-wash)}

/* ==========================================================================
   首屏（居中极简 + 漂浮白卡 + 客户端线路窗口）
   ========================================================================== */
.hero{
  position:relative;
  overflow-x:clip;
  max-width:100%;
  padding-top:28px;
  padding-bottom:44px;
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg) 46%,var(--bg-2) 100%);
}
.hero-ambient{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.hero-glow{
  position:absolute;
  left:50%;
  top:-280px;
  transform:translateX(-50%);
  width:min(1180px,100vw);
  height:860px;
  background:
    radial-gradient(36% 40% at 30% 36%,var(--glow-warm) 0%,var(--glow-warm-0) 68%),
    radial-gradient(32% 36% at 71% 24%,var(--glow-cool) 0%,var(--glow-cool-0) 70%),
    radial-gradient(52% 46% at 50% 10%,var(--glow-soft) 0%,var(--glow-soft-0) 74%);
  filter:blur(6px);
}
.hero-dots{
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle at 1px 1px,var(--dot) 1.1px,var(--dot-0) 1.6px);
  background-size:24px 24px;
}
.hero-fade{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:320px;
  background:linear-gradient(180deg,var(--bg-2-0) 0%,var(--bg-2) 86%);
}
.hero-inner{
  position:relative;
  z-index:2;
  max-width:1200px;
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.hero-copy{position:relative;z-index:3;max-width:720px;margin:0 auto;text-align:center}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:32px;
  padding-left:16px;
  padding-right:16px;
  border-radius:var(--r-pill);
  background:var(--accent-wash);
  border:1px solid var(--accent-line);
  color:var(--accent-dark);
  font-size:13px;
  font-weight:600;
  letter-spacing:.01em;
  box-shadow:0 6px 16px -10px var(--accent-soft-2);
  max-width:100%;
}
.hero-badge .badge-star{flex:none;fill:var(--accent)}
.hero-badge b{font-family:var(--font-mono);font-size:12.5px;font-weight:700}

.hero-h1{
  margin:16px 0 0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:60px;
  line-height:1.16;
  letter-spacing:-.025em;
  color:var(--text);
}
.h1-row{display:block}
.kw{position:relative;display:inline-block;white-space:nowrap;z-index:0}
.kw::after{
  content:"";
  position:absolute;
  left:-1.5%;
  right:-1.5%;
  bottom:.02em;
  height:.09em;
  border-radius:var(--r-pill);
  background:linear-gradient(90deg,var(--accent-wash) 0%,var(--accent) 7%,var(--accent) 93%,var(--accent-wash) 100%);
  transform:rotate(-.55deg);
  z-index:-1;
}
.kw::before{
  content:"";
  position:absolute;
  left:2%;
  right:5%;
  bottom:-.055em;
  height:.04em;
  border-radius:var(--r-pill);
  background:var(--accent);
  opacity:.5;
  transform:rotate(.5deg);
  z-index:-1;
}

.hero-cta{
  margin-top:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
}
.hero-sub{margin:14px 0 0;font-size:15.5px;line-height:1.7;color:var(--text-muted)}
.hero-sub strong{color:var(--text);font-weight:700}

.trust-row{
  margin-top:12px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:6px 18px;
  font-size:12.5px;
  color:var(--text-muted);
}
.trust-row li{display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.trust-row svg{flex:none;color:var(--success)}

.platform-row{
  margin-top:14px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:8px 20px;
}
.pf{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--text-muted);white-space:nowrap}
.pf-ico{width:16px;height:16px;flex:none;fill:var(--text-muted);opacity:.85;color:var(--text-muted)}

.flag-row{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px}
.flag-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:30px;
  padding-left:7px;
  padding-right:11px;
  border-radius:var(--r-pill);
  background:var(--bg-panel);
  border:1px solid var(--border);
  font-size:12px;
  font-weight:600;
  color:var(--text);
  white-space:nowrap;
  box-shadow:var(--shadow-pill);
  transition:transform .18s ease, box-shadow .18s ease;
}
.flag-pill:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
.flag{width:22px;height:15px;flex:none;border-radius:3px;overflow:hidden;box-shadow:0 0 0 1px var(--flag-line) inset}
.fl-red{fill:var(--flag-red)}
.fl-blue{fill:var(--flag-blue)}
.fl-white{fill:var(--flag-white)}
.fl-gold{fill:var(--flag-gold)}
.fl-green{fill:var(--flag-green)}
.fl-ink{fill:var(--flag-ink)}
.fl-line{stroke:var(--flag-line);stroke-width:.8}

/* ---- 四周漂浮小卡 ---- */
.floaters{position:absolute;inset:0;z-index:2;pointer-events:none}
.fcard{
  position:absolute;
  width:212px;
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 13px;
  border-radius:var(--r-md);
  background:var(--bg-panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  text-align:left;
  pointer-events:auto;
}
.fcard-ico{width:34px;height:34px;flex:none;display:grid;place-items:center;border-radius:var(--r-sm)}
.ico-mint{background:var(--candy-mint);color:var(--candy-mint-ink)}
.ico-pink{background:var(--candy-pink);color:var(--candy-pink-ink)}
.ico-cream{background:var(--candy-cream);color:var(--candy-cream-ink)}
.ico-sky{background:var(--candy-sky);color:var(--candy-sky-ink)}
.fcard-txt{display:flex;flex-direction:column;gap:1px;min-width:0}
.fcard-txt b{font-size:13px;font-weight:700;color:var(--text);line-height:1.35;letter-spacing:-.005em}
.fcard-txt i{font-style:normal;font-size:11.5px;color:var(--text-muted);line-height:1.4}
.fcard-a{left:2px;top:74px;animation:floaty 7.4s ease-in-out infinite}
.fcard-b{left:26px;top:194px;animation:floaty 8.8s ease-in-out .9s infinite}
.fcard-c{right:2px;top:66px;animation:floaty 8.1s ease-in-out .45s infinite}
.fcard-d{right:26px;top:188px;animation:floaty 7.8s ease-in-out 1.3s infinite}
@keyframes floaty{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-7px)}
}

/* ---- 首屏装置：客户端线路窗口 ---- */
.device{position:relative;width:min(860px,100%);margin:22px auto 0;isolation:isolate}
.device-halo{
  position:absolute;
  z-index:-2;
  left:50%;
  top:52%;
  transform:translate(-50%,-50%);
  width:min(780px,100%);
  height:300px;
  border-radius:50%;
  background:radial-gradient(50% 50% at 50% 50%,var(--accent-soft-2) 0%,var(--accent-soft-0) 72%);
  filter:blur(30px);
}
.device-base{
  position:absolute;
  z-index:-1;
  inset:-12px -16px -20px -16px;
  border-radius:var(--r-xl);
  background:linear-gradient(180deg,var(--bg-panel-2) 0%,var(--bg-panel-3) 100%);
  box-shadow:var(--shadow-base);
}
.device-window{
  position:relative;
  border-radius:var(--r-lg);
  background:var(--bg-panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow-device);
  overflow:hidden;
}
.win-chrome{
  height:42px;
  display:flex;
  align-items:center;
  gap:12px;
  padding-left:16px;
  padding-right:16px;
  background:linear-gradient(180deg,var(--bg-panel) 0%,var(--bg-panel-3) 100%);
  border-bottom:1px solid var(--border-soft);
}
.win-dots{display:inline-flex;gap:6px;flex:none}
.win-dots i{display:block;width:9px;height:9px;border-radius:50%}
.win-dots i:nth-child(1){background:var(--dot-red)}
.win-dots i:nth-child(2){background:var(--dot-gold)}
.win-dots i:nth-child(3){background:var(--dot-green)}
.win-title{font-size:12.5px;font-weight:600;color:var(--text-muted);letter-spacing:.01em}
.win-body{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:12px;
  padding:12px 12px 24px;
  background:linear-gradient(180deg,var(--bg-panel) 0%,var(--bg-panel-3) 100%);
}
.win-col{min-width:0}
.pane-head{display:flex;align-items:baseline;justify-content:space-between;gap:8px;padding:0 4px 8px}
.pane-title{font-size:12px;font-weight:700;color:var(--text)}
.pane-meta{font-size:11px;color:var(--text-muted)}
.route-list{display:grid;gap:7px}
.route{
  display:flex;
  align-items:center;
  gap:10px;
  height:34px;
  padding-left:10px;
  padding-right:10px;
  border-radius:var(--r-sm);
  background:var(--bg-panel);
  border:1px solid var(--border-soft);
  box-shadow:var(--shadow-row);
}
.route-flag{display:flex;flex:none;border-radius:4px;overflow:hidden}
.route-flag svg{width:24px;height:16px}
.route-name{display:flex;align-items:baseline;gap:6px;font-size:12.5px;font-weight:700;color:var(--text);white-space:nowrap}
.route-city{font-size:11px;font-weight:400;color:var(--text-muted)}
.chip{
  flex:none;
  font-size:10.5px;
  font-weight:700;
  padding:3px 8px;
  border-radius:var(--r-pill);
  letter-spacing:.02em;
  white-space:nowrap;
}
.route .chip{margin-left:auto}
.chip-iepl{background:var(--chip-iepl-bg);color:var(--chip-iepl-ink)}
.chip-relay{background:var(--chip-relay-bg);color:var(--chip-relay-ink)}
.chip-direct{background:var(--chip-direct-bg);color:var(--chip-direct-ink)}

.win-right{display:grid;gap:10px;align-content:start}
.conn-card{
  padding:12px;
  border-radius:var(--r-md);
  background:var(--bg-panel);
  border:1px solid var(--border-soft);
  box-shadow:var(--shadow-soft);
}
.conn-top{display:flex;align-items:center;gap:8px}
.conn-dot{position:relative;width:9px;height:9px;flex:none;border-radius:50%;background:var(--success)}
.conn-dot::after{
  content:"";
  position:absolute;
  inset:-4px;
  border-radius:50%;
  border:1.5px solid var(--success);
  opacity:.4;
  animation:ping 2.6s ease-out infinite;
}
@keyframes ping{
  0%{transform:scale(.7);opacity:.5}
  70%{transform:scale(1.9);opacity:0}
  100%{transform:scale(1.9);opacity:0}
}
.conn-state{font-size:14px;font-weight:800;color:var(--text);letter-spacing:-.01em}
.conn-line{margin-left:auto;font-family:var(--font-mono);font-size:11px;color:var(--text-muted);white-space:nowrap}
.conn-platforms{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}
.conn-platforms span{
  font-size:10.5px;
  font-weight:600;
  color:var(--text-muted);
  background:var(--bg-panel-3);
  border:1px solid var(--border-soft);
  padding:3px 7px;
  border-radius:var(--r-xs);
  white-space:nowrap;
}
.win-plan{
  padding:12px;
  border-radius:var(--r-md);
  background:var(--bg-panel);
  border:1px solid var(--border-soft);
  box-shadow:var(--shadow-soft);
}
.win-plan-head{font-size:11px;font-weight:700;color:var(--text-muted);letter-spacing:.08em;margin-bottom:8px}
.win-plan-list{display:grid;gap:6px}
.win-plan-list li{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:11.5px}
.win-plan-list span{color:var(--text-muted);white-space:nowrap}
.win-plan-list b{font-family:var(--font-mono);font-weight:700;font-size:11.5px;color:var(--text);white-space:nowrap}

.aux{
  position:absolute;
  display:flex;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border-radius:var(--r-md);
  background:var(--bg-panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow-float);
  font-size:11.5px;
  color:var(--text-muted);
  white-space:nowrap;
  transition:transform .18s ease, box-shadow .18s ease;
}
.aux:hover{transform:translateY(-2px)}
.aux b{font-family:var(--font-mono);font-size:12px;font-weight:700;color:var(--text)}
.aux-ico{width:26px;height:26px;flex:none;display:grid;place-items:center;border-radius:var(--r-xs)}
.aux-a{right:-30px;top:-20px}
.aux-b{left:-30px;bottom:-20px}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-foot{
  position:relative;
  overflow-x:clip;
  border-top:1px solid var(--border);
  background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg) 100%);
  color:var(--text);
}
.foot-inner{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.25fr .85fr;
  gap:40px;
  padding-top:56px;
  padding-bottom:40px;
}
.foot-brand{min-width:0}
.foot-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.foot-logo img{width:30px;height:30px;flex:none}
.foot-logo b{font-family:var(--font-display);font-weight:800;font-size:18px;letter-spacing:-.015em;color:var(--text)}
.foot-tag{margin:14px 0 0;max-width:36ch;font-size:13.5px;line-height:1.75;color:var(--text-muted)}
.foot-facts{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.foot-facts li{
  font-family:var(--font-mono);
  font-size:11.5px;
  padding:4px 9px;
  border-radius:var(--r-pill);
  background:var(--bg-panel);
  border:1px solid var(--border);
  color:var(--text-muted);
  white-space:nowrap;
  max-width:100%;
  overflow:hidden;
  text-overflow:ellipsis;
}
.foot-col{min-width:0}
.foot-h{
  margin:0 0 14px;
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--text-muted);
  text-transform:uppercase;
}
.foot-col ul{display:grid;gap:2px;margin:0;padding:0;list-style:none}
.foot-col a{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding-top:4px;
  padding-bottom:4px;
  font-size:13.5px;
  color:var(--text-muted);
  transition:color .16s ease;
}
.foot-col a:hover{color:var(--accent-dark)}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px}
.foot-tags a{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  max-width:100%;
  padding:4px 10px;
  border-radius:var(--r-pill);
  background:var(--bg-panel);
  border:1px solid var(--border);
  font-size:12px;
  color:var(--text-muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.foot-tags a:hover{border-color:var(--accent-line);color:var(--accent-dark)}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-top:18px;
  padding-bottom:28px;
  border-top:1px solid var(--border-soft);
}
.foot-copy{margin:0;font-family:var(--font-mono);font-size:12px;color:var(--text-muted)}
.foot-legal{display:flex;flex-wrap:wrap;gap:4px 18px;margin:0;padding:0;list-style:none}
.foot-legal a{display:inline-flex;align-items:center;min-height:32px;font-size:12.5px;color:var(--text-muted)}
.foot-legal a:hover{color:var(--accent-dark)}

/* ==========================================================================
   通用卡片 / 面板 / 图标底板
   ========================================================================== */
.card{
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-soft);
  min-width:0;
}
.card-pad{padding:22px}
.card-lift{transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease}
.card-lift:hover{transform:translateY(-2px);box-shadow:var(--shadow-card);border-color:var(--border)}
.panel{background:var(--bg-panel-2);border-radius:var(--r-lg);min-width:0}
.panel-pad{padding:20px}
.icon-plate{width:38px;height:38px;flex:none;display:grid;place-items:center;border-radius:var(--r-sm)}
.icon-plate svg{width:20px;height:20px}

/* ==========================================================================
   滚动揭示（可见性默认在 CSS 里是「可见」，隐藏态单独由 .pending 承担）
   ========================================================================== */
.reveal{transition:opacity .62s cubic-bezier(.22,.61,.36,1), transform .62s cubic-bezier(.22,.61,.36,1)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}

/* ==========================================================================
   无障碍与溢出防护
   ========================================================================== */
:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.btn:focus-visible,.btn-login:focus-visible,.lang-btn:focus-visible,.nav-toggle:focus-visible{outline-offset:3px}
.table-scroll:focus-visible,.toc-tabs a:focus-visible{outline-offset:2px}

#server-status{
  position:static;
  display:block;
  max-width:100%;
  overflow:hidden;
  margin:0 0 28px;
}
#server-status > *{max-width:100%}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1180px){
  .head-inner{gap:14px}
  .nav a{padding-left:8px;padding-right:8px;font-size:13.5px}
}
@media (max-width:1120px){
  .floaters{
    position:static;
    inset:auto;
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:10px;
    margin-top:18px;
    pointer-events:auto;
  }
  .fcard{position:static;width:auto;flex:0 1 214px;animation:none}
}
@media (max-width:980px){
  .nav{display:none}
  .head-right{margin-left:auto}
  .nav-toggle{display:inline-flex}
  .hero-h1{font-size:52px}
  .foot-inner{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  :root{--gutter:20px;--sec-y:60px}
}
@media (max-width:760px){
  .win-body{grid-template-columns:1fr}
  .aux{display:none}
  .hero{padding-top:20px}
  .hero-h1{font-size:40px}
  .device{margin-top:18px}
  .foot-inner{grid-template-columns:1fr;gap:28px}
}
@media (max-width:640px){
  :root{--gutter:16px;--sec-y:52px;--head-h:56px}
  .no-break{white-space:normal}
  .brand-zh{display:none}
  .lang{display:none}
  .hero-h1{font-size:38px;letter-spacing:-.02em}
  .hero-sub{font-size:14px}
  .btn{height:44px;padding-left:20px;padding-right:20px;font-size:14px}
  .hero-badge{font-size:12px;padding-left:13px;padding-right:13px}
  .trust-row{gap:5px 14px;font-size:12px}
  .fcard{flex:1 1 100%}
  .device-base{inset:-8px -8px -14px -8px}
  .route-name{font-size:12px}
  .route-city{display:none}
  .btn-login{padding-left:14px;padding-right:14px}
  .foot-bottom{padding-bottom:24px}
}
@media (max-width:480px){
  .lang-current{display:none}
  .lang-btn{padding-left:10px;padding-right:9px}
  .hero-h1{font-size:34px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1!important;transform:none!important}
}

/* lh:local-harden:start */
:is(h1,h2,h3,h4){text-wrap:balance}
:is(p,li,dd,dt,figcaption,blockquote,td,th){text-wrap:pretty}
html[lang|="ko"] body{word-break:keep-all;overflow-wrap:break-word}
html[lang|="ja"] :is(h1,h2,h3,h4){word-break:auto-phrase}
.lh-tscroll{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}
@media (max-width:640px){.lh-tscroll :is(th,td){min-width:5.5em}}
@supports (animation-timeline:scroll()){
  .float-cta{animation:lh-fab-in linear both;animation-timeline:scroll(root);animation-range:0 70vh}
}
@keyframes lh-fab-in{0%,45%{opacity:0;visibility:hidden}100%{opacity:1;visibility:visible}}
/* lh:local-harden:end */