@charset "utf-8";
/* ============================================================================
   VPNTA · base.css
   设计令牌 / reset / 排版 / 按钮 / 头部 / 页脚 / 通用面板 / 可见性
   所有颜色只允许出现在 :root 令牌里，组件一律 var() 引用。
   ========================================================================== */

:root{
  /* —— 基底与面板 —— */
  --bg:#E7EEF6;
  --bg-panel:#F7FAFD;
  --bg-panel-2:#D9E6F3;
  --surface:#FFFFFF;
  --border:#C4D4E7;
  --hairline:rgba(196,212,231,.9);
  --border-50:rgba(196,212,231,.5);

  /* —— 文字与语义 —— */
  --text:#0C1A28;
  --text-muted:#52667C;
  --accent:#0B6F82;
  --accent-dark:#074E5C;
  --success:#0F8A63;
  --warn:#B97A12;
  --error:#C0394C;

  /* —— 渐变伴色与中间过渡色（只给装置与品牌字） —— */
  --violet:#6F5BD6;
  --violet-soft:#9A82F0;
  --teal-bright:#1E9FB8;
  --grad-blue:#2F63B8;
  --grad-blue-2:#2C6FA8;
  --grad-teal:#0E8FA6;
  --grad-blue-3:#2B6BAE;
  --grad-indigo:#5B5FCE;
  --grad-violet:#8A72E8;
  --grad-violet-2:#B4A0F8;

  /* —— 统计卡色块 —— */
  --card-blue:#CFE1F4;
  --card-pink:#F3DDEC;
  --card-orange:#F8E1CE;

  /* —— 旗帜色 —— */
  --flag-red:#C0394C;
  --flag-blue:#1B3A7A;
  --flag-white:#FFFFFF;
  --flag-gold:#E8C069;

  /* —— 深色面（终端 / 页脚 / CTA 带） —— */
  --ink-900:#0C1A28;
  --ink-800:#0A2A38;
  --ink-700:#12384A;
  --on-ink:rgba(255,255,255,.94);
  --on-ink-mid:rgba(255,255,255,.72);
  --on-ink-muted:rgba(255,255,255,.5);
  --on-ink-line:rgba(255,255,255,.14);
  --on-ink-fill:rgba(255,255,255,.06);

  /* —— 玻璃与半透明表面 —— */
  --glass-98:rgba(255,255,255,.98);
  --glass-95:rgba(255,255,255,.95);
  --glass-92:rgba(255,255,255,.92);
  --glass-88:rgba(255,255,255,.88);
  --glass-80:rgba(255,255,255,.80);
  --glass-72:rgba(255,255,255,.72);
  --glass-55:rgba(255,255,255,.55);
  --glass-26:rgba(255,255,255,.26);
  --glass-14:rgba(255,255,255,.14);
  --glass-00:rgba(255,255,255,0);
  --panel-88:rgba(247,250,253,.88);
  --panel2-42:rgba(217,230,243,.42);

  /* —— 强调色透明阶 —— */
  --accent-06:rgba(11,111,130,.06);
  --accent-09:rgba(11,111,130,.09);
  --accent-12:rgba(11,111,130,.12);
  --accent-16:rgba(11,111,130,.16);
  --accent-30:rgba(11,111,130,.30);
  --accent-45:rgba(11,111,130,.45);
  --accent-62:rgba(11,111,130,.62);
  --violet-13:rgba(111,91,214,.13);
  --violet-20:rgba(111,91,214,.20);
  --warn-09:rgba(185,122,18,.09);
  --error-09:rgba(192,57,76,.09);
  --success-16:rgba(15,138,99,.16);
  --ink-line:rgba(12,26,40,.40);
  --ink-grid:rgba(12,26,40,.055);
  --ink-90:rgba(12,26,40,.9);
  --ink-95:rgba(12,26,40,.95);

  /* —— 圆角 —— */
  --r-xs:6px;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;

  /* —— 阴影（带色柔影 + 内高光） —— */
  --shadow-head:0 22px 44px -32px var(--accent-62);
  --shadow-panel:0 34px 60px -30px var(--accent-62);
  --shadow-card:0 26px 50px -36px rgba(11,111,130,.6);
  --shadow-soft:0 12px 26px -22px rgba(11,111,130,.95);
  --shadow-cta:0 20px 34px -22px var(--ink-90);
  --shadow-cta-hover:0 26px 40px -22px var(--ink-95);
  --shadow-inset-top:inset 0 1px 0 var(--surface);

  /* —— 字体 —— */
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,"Noto Sans SC",monospace;

  /* —— 版心与节奏 —— */
  --maxw:1240px;
  --gutter:28px;
  --head-h:64px;
  --sp-1:4px;
  --sp-2:8px;
  --sp-3:12px;
  --sp-4:16px;
  --sp-5:24px;
  --sp-6:32px;
  --sp-7:48px;
  --sp-8:64px;
  --sp-9:88px;

  /* —— 字号 —— */
  --fs-display:clamp(2.125rem,1.15rem + 3.9vw,4.5rem);
  --fs-h2:clamp(1.75rem,1.2rem + 1.9vw,2.75rem);
  --fs-h3:clamp(1.1875rem,1.05rem + .7vw,1.5rem);
  --fs-lede:clamp(1.0625rem,1rem + .35vw,1.3125rem);

  /* —— 缓动 —— */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,.84,.44,1);

  /* —— 装置专用复合令牌（线路核） —— */
  --disc-fill:radial-gradient(circle at 34% 26%,rgba(255,255,255,.98) 0%,rgba(240,250,253,.88) 22%,rgba(214,236,247,.55) 52%,rgba(198,226,243,.32) 74%,rgba(190,220,240,.14) 100%);
  --disc-shadow:0 60px 100px -42px rgba(11,111,130,.45),0 0 0 1px rgba(255,255,255,.85),inset 0 2px 0 rgba(255,255,255,.95),inset 0 -40px 70px -40px rgba(11,111,130,.3);
  --disc-tint:radial-gradient(circle at 70% 78%,rgba(111,91,214,.2),rgba(111,91,214,0) 56%);
  --disc-shine:radial-gradient(circle at 32% 22%,rgba(255,255,255,.85) 0%,rgba(255,255,255,.26) 18%,rgba(255,255,255,0) 42%);
  --fin-a-fill:linear-gradient(104deg,var(--teal-bright) 0%,var(--accent) 26%,var(--grad-blue) 56%,var(--violet) 84%,var(--violet-soft) 100%);
  --fin-b-fill:linear-gradient(96deg,var(--grad-teal) 0%,var(--grad-blue-3) 34%,var(--grad-indigo) 70%,var(--violet-soft) 100%);
  --fin-c-fill:linear-gradient(108deg,var(--grad-blue) 0%,var(--grad-indigo) 44%,var(--grad-violet) 78%,var(--grad-violet-2) 100%);
  --fin-sheen:linear-gradient(180deg,rgba(255,255,255,.78) 0%,rgba(255,255,255,.14) 18%,rgba(255,255,255,0) 38%,rgba(6,36,54,.18) 82%,rgba(6,36,54,.44) 100%);
  --fin-shadow-a:inset 0 3px 0 rgba(255,255,255,.8),inset 0 -14px 22px -14px rgba(4,38,56,.9),0 12px 0 -2px rgba(9,58,80,.2),0 30px 44px -24px rgba(11,111,130,.55);
  --fin-shadow-b:inset 0 3px 0 rgba(255,255,255,.72),inset 0 -14px 22px -14px rgba(4,38,56,.85),0 11px 0 -2px rgba(9,58,80,.18),0 28px 40px -24px rgba(11,111,130,.5);
  --fin-shadow-c:inset 0 2px 0 rgba(255,255,255,.66),inset 0 -12px 20px -12px rgba(4,38,56,.8),0 10px 0 -2px rgba(9,58,80,.16),0 24px 36px -22px rgba(111,91,214,.5);
  --term-fill:linear-gradient(160deg,var(--ink-900) 0%,var(--ink-800) 100%);
  --term-shadow:0 30px 50px -24px rgba(7,30,45,.85),inset 0 1px 0 rgba(255,255,255,.14);
}

/* ============================ reset ============================ */
*,*::before,*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--head-h) + 20px);
}

body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  color:var(--text);
  background:var(--bg);
  overflow-x:clip;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

html.nav-open{overflow:hidden;}

h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;}
svg{display:block;}
img{max-width:100%;height:auto;}
button{font:inherit;color:inherit;}
table{border-collapse:collapse;}

::selection{background:var(--accent-16);color:var(--text);}

main{position:relative;z-index:1;}

/* ============================ 排版 ============================ */
h1{
  font-family:var(--font-display);
  font-size:var(--fs-display);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  text-wrap:balance;
}

h2{
  font-family:var(--font-display);
  font-size:var(--fs-h2);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.02em;
  text-wrap:balance;
}

h3{
  font-family:var(--font-display);
  font-size:var(--fs-h3);
  font-weight:700;
  line-height:1.34;
  letter-spacing:-.01em;
}

h4{font-size:1.0625rem;font-weight:700;line-height:1.45;}

p{line-height:1.72;}

.lede{
  font-size:var(--fs-lede);
  line-height:1.7;
  color:var(--text-muted);
  max-width:64ch;
}

.mono-label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-muted);
}

.mono{font-family:var(--font-mono);}

/* 中文关键词防断词：只包 2~4 个汉字，窄屏放开 */
.no-break{white-space:nowrap;}

.visually-hidden{
  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;
}

/* ============================ 版心与分区 ============================ */
.wrap{
  width:100%;
  max-width:calc(var(--maxw) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.sec{padding-top:clamp(52px,6.4vw,96px);padding-bottom:clamp(52px,6.4vw,96px);}
.sec-tight{padding-top:clamp(32px,4vw,56px);padding-bottom:clamp(32px,4vw,56px);}

.sec-head{max-width:760px;margin-bottom:clamp(24px,3vw,40px);}
.sec-head .mono-label{margin-bottom:12px;}
.sec-head h2 + .lede{margin-top:14px;}

.grid{display:grid;gap:clamp(16px,2vw,24px);}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-2 > *,.grid-3 > *,.grid > *{min-width:0;}

.stack{display:flex;flex-direction:column;gap:var(--sp-4);}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--sp-3);}

/* 氛围层：极淡方格网 */
.grid-layer{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,var(--ink-grid) 1px,transparent 1px),
    linear-gradient(to bottom,var(--ink-grid) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.6) 52%,rgba(0,0,0,0) 94%);
  mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.6) 52%,rgba(0,0,0,0) 94%);
}

/* ============================ 按钮 ============================ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:52px;
  padding:0 26px;
  border:0;
  border-radius:var(--r-sm);
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  white-space:nowrap;
  flex-shrink:0;
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}

.btn-primary{
  background:var(--text);
  color:var(--flag-white);
  box-shadow:var(--shadow-cta),inset 0 1px 0 var(--glass-14);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-cta-hover),inset 0 1px 0 var(--glass-14);}

.btn-secondary,
.btn-ghost{
  background:var(--glass-88);
  color:var(--text);
  border:1px solid var(--border);
  box-shadow:var(--shadow-soft);
}
.btn-secondary:hover,
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-dark);}

.btn-invert{
  background:var(--surface);
  color:var(--text);
  box-shadow:0 18px 30px -24px var(--ink-95);
}
.btn-invert:hover{transform:translateY(-1px);color:var(--accent-dark);}

.btn-sm{min-height:40px;padding:0 18px;font-size:11.5px;letter-spacing:.14em;}
.btn-block{width:100%;}

a.btn:focus-visible,
button.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}

/* ============================ 徽章 / 芯片 / 标签 ============================ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:28px;
  max-width:100%;
  padding:0 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--glass-95);
  background:var(--glass-80);
  box-shadow:var(--shadow-soft),inset 0 1px 0 var(--surface);
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--accent-dark);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.chip{
  display:inline-flex;
  align-items:center;
  min-height:26px;
  max-width:100%;
  padding:0 10px;
  border-radius:var(--r-xs);
  border:1px solid var(--border);
  background:var(--glass-72);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:var(--text);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.tick{color:var(--success);flex:none;}

/* ============================ 面板 / 卡片 ============================ */
.panel{
  position:relative;
  padding:clamp(20px,2.4vw,32px);
  border-radius:var(--r-lg);
  border:1px solid var(--border);
  background:var(--bg-panel);
  box-shadow:var(--shadow-card),inset 0 1px 0 var(--surface);
}
.panel > *{min-width:0;}

.panel-soft{
  background:linear-gradient(160deg,var(--bg-panel-2),var(--bg-panel));
  box-shadow:var(--shadow-soft);
}

.panel-ink{
  background:var(--term-fill);
  border-color:var(--on-ink-line);
  color:var(--on-ink);
  box-shadow:var(--term-shadow);
}

/* ============================ 头部 ============================ */
.site-head{position:relative;z-index:20;padding-top:14px;}

.head-inner{
  position:relative;
  z-index:36;
  display:flex;
  align-items:center;
  gap:26px;
  min-height:var(--head-h);
  padding:0 18px 0 16px;
  border-radius:var(--r-md);
  border:1px solid var(--glass-92);
  background:linear-gradient(180deg,var(--glass-95),var(--panel-88));
  box-shadow:var(--shadow-head),0 0 0 1px var(--border-50);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}

.brand{display:inline-flex;align-items:center;gap:9px;flex:none;min-width:0;}
.brand-mark{width:30px;height:30px;flex:none;}
.brand-logo{
  width:30px;height:30px;
  flex:none;
  border-radius:50%;
  box-shadow:0 8px 16px -8px var(--accent),inset 0 1px 0 var(--glass-55);
}
.brand-word{
  font-family:var(--font-display);
  font-size:17.5px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--text);
  white-space:nowrap;
}
.brand-cn{
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--text-muted);
  padding-left:1px;
  white-space:nowrap;
}

.main-nav{
  display:flex;
  align-items:center;
  gap:20px;
  margin:0 0 0 auto;
  padding:0;
  list-style:none;
  min-width:0;
}
.main-nav > li{display:flex;}
.main-nav ul{
  display:flex;
  align-items:center;
  gap:20px;
  margin:0;
  padding:0;
  list-style:none;
}
.main-nav ul > li{display:flex;}
.main-nav a{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:6px 1px;
  font-size:13.5px;
  font-weight:500;
  letter-spacing:.01em;
  color:var(--text-muted);
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.main-nav a:hover{color:var(--text);}
.main-nav a.is-active{color:var(--text);font-weight:700;}

.tools,
.head-right{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:18px;
  padding-left:18px;
  border-left:1px solid var(--hairline);
  flex:none;
}

.lang{position:relative;}
.lang-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:5px;
  min-height:34px;
  padding:0 8px;
  border:0;
  border-radius:var(--r-xs);
  background:transparent;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--text-muted);
  cursor:pointer;
}
.lang-btn:hover{color:var(--text);}
.lang-btn .caret{width:9px;height:9px;flex:none;}

.lang-menu{
  position:absolute;
  right:0;
  top:calc(100% + 8px);
  z-index:30;
  display:none;
  min-width:158px;
  padding:6px;
  border-radius:var(--r-sm);
  border:1px solid var(--border);
  background:var(--bg-panel);
  box-shadow:var(--shadow-panel);
}
.lang.is-open .lang-menu{display:block;}
.lang-menu a{
  display:flex;
  align-items:center;
  width:100%;
  min-height:36px;
  padding:0 10px;
  border-radius:var(--r-xs);
  font-size:13px;
  color:var(--text);
}
.lang-menu a:hover{background:var(--accent-06);color:var(--accent-dark);}
.lang-menu a[aria-current=""]{font-weight:700;color:var(--accent-dark);}

.login-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:34px;
  padding:0 16px;
  border-radius:var(--r-sm);
  border:1px solid var(--border);
  background:var(--surface);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--text);
  white-space:nowrap;
  box-shadow:0 8px 16px -12px var(--accent);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.login-btn:hover{border-color:var(--accent);color:var(--accent-dark);}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  min-width:44px;
  min-height:44px;
  padding:0;
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  background:var(--surface);
  color:var(--text);
  cursor:pointer;
}
.nav-toggle svg{width:18px;height:18px;}

/* 抽屉：实色背景、整行可点、独立滚动 */
.nav-drawer{
  position:absolute;
  left:0;
  right:0;
  top:calc(100% + 8px);
  z-index:40;
  display:none;
  padding:8px 14px 14px;
  border-radius:var(--r-md);
  border:1px solid var(--border);
  background:var(--bg-panel);
  box-shadow:var(--shadow-panel);
  max-height:calc(100dvh - 120px);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:flex;
  align-items:center;
  width:100%;
  min-height:44px;
  padding:10px 6px;
  font-size:15px;
  color:var(--text);
  border-bottom:1px solid var(--hairline);
}
.nav-drawer a:hover{color:var(--accent-dark);}
.nav-drawer a.is-active{font-weight:700;color:var(--accent-dark);}
.nav-drawer .drawer-label{
  display:block;
  padding:14px 6px 4px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.nav-drawer .drawer-lang a{border-bottom:0;font-size:14px;color:var(--text-muted);}

/* 抽屉遮罩：铺满视口，压在页头内容之上、抽屉之下 */
.drawer-veil{
  position:fixed;
  inset:0;
  z-index:10;
  background:rgba(10,14,22,.45);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
}
.drawer-veil[hidden]{display:none;}
/* 抽屉内的导航/语言列表：去项目符号，整行可点 */
.nav-drawer .drawer-list,
.nav-drawer .drawer-langs{
  margin:0;
  padding:0;
  list-style:none;
}
.nav-drawer .drawer-title{
  margin:14px 6px 4px;
  padding:0;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.nav-drawer .drawer-langs a{border-bottom:0;font-size:14px;color:var(--text-muted);}

/* ============================ 页脚 ============================ */
.site-foot{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,6vw,88px);
  overflow-x:clip;
  background:linear-gradient(168deg,var(--ink-900) 0%,var(--ink-800) 100%);
  color:var(--on-ink);
}
.site-foot::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,var(--on-ink-line) 1px,transparent 1px),
    linear-gradient(to bottom,var(--on-ink-line) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.45;
  -webkit-mask-image:linear-gradient(to bottom,#000,rgba(0,0,0,0) 72%);
  mask-image:linear-gradient(to bottom,#000,rgba(0,0,0,0) 72%);
}
.site-foot a:focus-visible,
.site-foot button:focus-visible{outline:2px solid var(--flag-gold);outline-offset:3px;}

.foot-inner{position:relative;padding-top:clamp(40px,5vw,64px);}

.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr)) minmax(0,1.15fr);
  gap:36px 32px;
}
.foot-grid > *{min-width:0;}

.foot-brand{display:flex;flex-direction:column;gap:14px;max-width:340px;}
.foot-brand-line{display:inline-flex;align-items:center;gap:10px;}
.foot-brand-line img{width:30px;height:30px;flex:none;border-radius:50%;}
.foot-brand-name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--on-ink);
}
.foot-desc{font-size:13.5px;line-height:1.7;color:var(--on-ink-mid);}

.foot-h{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--on-ink-muted);
}

.foot-links{display:flex;flex-direction:column;gap:2px;}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  font-size:13.5px;
  color:var(--on-ink-mid);
  transition:color .18s var(--ease);
}
.foot-links a:hover{color:var(--on-ink);}

.foot-hot{display:flex;flex-wrap:wrap;gap:8px;}
.foot-hot a{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  max-width:100%;
  padding:0 10px;
  border-radius:var(--r-xs);
  border:1px solid var(--on-ink-line);
  background:var(--on-ink-fill);
  font-size:12px;
  color:var(--on-ink-mid);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.foot-hot a:hover{border-color:var(--teal-bright);color:var(--on-ink);}

.foot-lang{display:flex;flex-wrap:wrap;gap:6px 16px;}
.foot-lang a{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  font-size:13px;
  color:var(--on-ink-mid);
}
.foot-lang a:hover{color:var(--on-ink);}
.foot-lang a[aria-current="true"]{color:var(--on-ink);font-weight:600;}

.foot-bar{
  margin-top:clamp(32px,4vw,48px);
  padding-top:18px;
  padding-bottom:22px;
  border-top:1px solid var(--on-ink-line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
}
.foot-copy{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--on-ink-muted);
}
.foot-legal{display:flex;flex-wrap:wrap;gap:6px 18px;}
.foot-legal a{
  display:inline-flex;
  align-items:center;
  min-height:24px;
  font-size:12.5px;
  color:var(--on-ink-mid);
}
.foot-legal a:hover{color:var(--on-ink);}

/* ============================ 滚动淡入（可见性反转） ============================ */
.reveal{transition:opacity .5s var(--ease-out),transform .5s var(--ease-out);}
.reveal.pending{opacity:0;transform:translateY(16px);}

/* ============================ 焦点可见 ============================ */
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

/* ============================ 长串与溢出防御 ============================ */
code,kbd,samp{
  font-family:var(--font-mono);
  font-size:.9em;
  overflow-wrap:anywhere;
  word-break:break-word;
}
pre{
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  margin:0;
  padding:16px;
  border-radius:var(--r-sm);
  background:var(--term-fill);
  color:var(--on-ink);
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.65;
}
pre code{overflow-wrap:normal;white-space:pre;color:inherit;}

.tilt{transform:rotate(-.45deg);}

/* 线路状态脚手架容器：文档流占位 + 夹住网格 */
#server-status{
  position:relative;
  display:block;
  max-width:100%;
  overflow:hidden;
  margin-top:0;
  margin-bottom:var(--sp-6);
  contain:layout paint;
}
#server-status > *{max-width:100%;}

/* ============================ 响应式 ============================ */
@media (max-width:1180px){
  .main-nav,
  .main-nav ul{gap:16px;}
  .main-nav a{font-size:13px;}
}

@media (max-width:980px){
  .head-inner{flex-wrap:wrap;gap:12px;min-height:0;padding:10px 14px;}
  .main-nav{display:none;}
  .tools,
  .head-right{margin-left:auto;padding-left:0;border-left:0;gap:10px;}
  .nav-toggle{display:inline-flex;}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:640px){
  :root{--gutter:18px;}

  .no-break{white-space:normal;}

  .tilt{transform:none;}

  .grid-2,.grid-3{grid-template-columns:1fr;}

  .btn{min-height:48px;padding:0 20px;font-size:11.5px;letter-spacing:.12em;}
  .btn-sm{min-height:40px;padding:0 16px;}

  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-brand{max-width:none;}
  .foot-bar{justify-content:flex-start;}

  .brand-word{font-size:16px;}
  .head-right .lang{display:none;}
  .login-btn{min-height:32px;padding:0 10px;font-size:10.5px;letter-spacing:.1em;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none;}
  .btn,.post-card,.float-cta{transition:none;}
}

/* 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 */