/* ==========================================================================
   ZaraVPN — base.css
   设计令牌 / reset / 排版 / 站点外壳（头部、页脚）/ 按钮 / 面板 / reveal
   所有颜色、字体、圆角、投影一律走 :root 令牌，组件内不散落硬编码色值。
   ========================================================================== */

:root{
  /* ---- 纸面与面板 ---- */
  --paper:#FBF2E2;
  --paper-deep:#F6EAD6;
  --panel:#FFFBF1;
  --panel-2:#F2E4CB;
  --chrome:#F4E7D0;
  --line:#E3D1B4;
  --line-soft:#EEDFC6;
  --line-strong:#C9B48F;
  --white:#FFFFFF;

  /* ---- 文字 ---- */
  --ink:#241E17;
  --ink-2:#6B5E4C;

  /* ---- 三枚强调色 ---- */
  --indigo:#2A2E6E;
  --indigo-dark:#1B1D4A;
  --sage:#5E7C46;
  --forest:#1F3327;

  /* ---- 语义色 ---- */
  --success:#3F6B4A;
  --warn:#B8862F;
  --error:#A63A2A;

  /* ---- 透明派生色（只在这里出现 rgba） ---- */
  --indigo-00:rgba(42,46,110,0);
  --indigo-04:rgba(42,46,110,.04);
  --indigo-06:rgba(42,46,110,.06);
  --indigo-08:rgba(42,46,110,.08);
  --indigo-12:rgba(42,46,110,.12);
  --indigo-16:rgba(42,46,110,.16);
  --indigo-22:rgba(42,46,110,.22);
  --indigo-30:rgba(42,46,110,.30);
  --sage-00:rgba(94,124,70,0);
  --sage-08:rgba(94,124,70,.08);
  --sage-12:rgba(94,124,70,.12);
  --sage-30:rgba(94,124,70,.30);
  --sage-45:rgba(94,124,70,.45);
  --success-16:rgba(63,107,74,.16);
  --white-70:rgba(255,255,255,.7);
  --white-40:rgba(255,255,255,.4);
  --white-20:rgba(255,255,255,.2);
  --white-18:rgba(255,255,255,.18);
  --white-12:rgba(255,255,255,.12);
  --grid-line:rgba(42,46,110,.055);
  --veil:rgba(36,30,23,.38);

  /* ---- 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,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;

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

  /* ---- 投影 ---- */
  --sh-header:0 18px 34px -30px var(--indigo-30), 0 1px 0 var(--white) inset;
  --sh-eyebrow:0 8px 16px -14px var(--indigo-30);
  --sh-btn:0 16px 28px -16px var(--indigo-30), 0 1px 0 var(--white-18) inset;
  --sh-ghost:0 10px 20px -18px var(--indigo-30);
  --sh-device:0 44px 84px -44px var(--indigo-30), 0 14px 28px -20px var(--indigo-22), 0 1px 0 var(--white) inset;
  --sh-band:0 22px 42px -34px var(--indigo-30), 0 1px 0 var(--white) inset;
  --sh-panel:0 22px 42px -34px var(--indigo-30), 0 1px 0 var(--white) inset;
  --sh-float:0 24px 44px -26px var(--indigo-30), 0 1px 0 var(--white) inset;

  /* ---- 版心与节奏 ---- */
  --gutter:24px;
  --wrap-max:1240px;
  --header-h:62px;
  --focus:var(--indigo);
}

/* ============================ reset ============================ */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.5;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(180deg,var(--indigo-06) 0%,var(--indigo-00) 46%),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px),
    linear-gradient(180deg,var(--grid-line) 1px,transparent 1px);
  background-size:auto,32px 32px,32px 32px;
  -webkit-font-smoothing:antialiased;
}
body::selection{background:var(--sage-30);color:var(--ink)}
img,svg{max-width:100%}
img{height:auto;border:0}
svg{vertical-align:middle}
figure{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
::selection{background:var(--sage-30);color:var(--ink)}
[hidden]{display:none !important}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden}

/* ============================ 排版 ============================ */
h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--ink);
  text-wrap:balance;
}
h1{font-size:clamp(34px,4.6vw,60px);line-height:1.1;font-weight:500}
h2{font-size:clamp(24px,2.8vw,36px);line-height:1.15}
h3{font-size:clamp(18px,1.9vw,22px);line-height:1.3;letter-spacing:-.015em}
h4{font-size:16px;line-height:1.35;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
strong,b{font-weight:600}
ul,ol{margin:0 0 1em;padding-left:1.3em}
li{margin:.25em 0}
hr{border:0;border-top:1px dashed var(--line);margin:28px 0}
blockquote{margin:0}
code,kbd,samp{
  font-family:var(--font-mono);
  font-size:.9em;
  overflow-wrap:anywhere;
  word-break:break-word;
  background:var(--panel-2);
  border-radius:var(--r-xs);
  padding:.1em .4em;
}
pre{
  margin:0 0 1.2em;
  padding:16px 18px;
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.65;
  color:var(--ink);
}
pre code{background:none;padding:0;overflow-wrap:normal;word-break:normal;font-size:inherit}

/* ============================ 版心 ============================ */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.wrap--narrow{max-width:900px}
.mono{font-family:var(--font-mono)}
.muted{color:var(--ink-2)}
.sr-only{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:120;
  display:inline-flex;align-items:center;min-height:40px;padding:0 16px;
  background:var(--panel);border:1px solid var(--indigo);border-radius:var(--r-pill);
  color:var(--indigo);font-size:14px;font-weight:600;text-decoration:none;
  transition:top .15s ease;
}
.skip-link:focus{top:12px}

/* 中文防断词：只包 2~4 个汉字的关键词 */
.no-break{white-space:nowrap}

/* ============================ 焦点可见 ============================ */
:where(a,button,summary,[tabindex],input,select,textarea):focus-visible{
  outline:2px solid var(--focus);
  outline-offset:2px;
  border-radius:var(--r-xs);
}
:where(a,button,summary){-webkit-tap-highlight-color:transparent}

/* ============================ 按钮 ============================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 30px;border-radius:var(--r-pill);
  font-family:var(--font-body);
  font-size:16px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease,color .15s ease;
}
.btn svg{flex:0 0 auto}
.btn-primary{
  color:var(--panel);
  background-image:linear-gradient(180deg,var(--indigo) 0%,var(--indigo-dark) 100%);
  border-color:var(--indigo-dark);
  box-shadow:var(--sh-btn);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--sh-device)}
.btn-ghost{
  color:var(--indigo);
  background:var(--panel);
  border-color:var(--indigo-22);
  box-shadow:var(--sh-ghost);
}
.btn-ghost:hover{background:var(--indigo-04);transform:translateY(-1px)}
.btn-secondary{
  color:var(--indigo);
  background:var(--panel);
  border-color:var(--line-strong);
  box-shadow:var(--sh-ghost);
}
.btn-secondary:hover{background:var(--indigo-06);border-color:var(--indigo);transform:translateY(-1px)}
.btn-sm{height:44px;padding:0 20px;font-size:14.5px;border-radius:var(--r-pill)}
.btn-block{width:100%}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.55;pointer-events:none}

/* ============================ 公告条 ============================ */
.announce{
  background-image:linear-gradient(90deg,var(--panel-2) 0%,var(--paper-deep) 52%,var(--panel-2) 100%);
  border-bottom:1px solid var(--line);
}
.announce-link{
  display:flex;align-items:center;justify-content:center;gap:8px;
  min-height:36px;padding:6px 16px;text-align:center;
  text-decoration:none;
  font-size:13px;letter-spacing:.01em;color:var(--ink-2);
}
.announce-link strong{color:var(--ink);font-weight:600}
.announce-arrow{color:var(--indigo);font-weight:700;font-size:14px;line-height:1;flex:0 0 auto}

/* ============================ 头部 ============================ */
.site-header{padding-top:14px;position:relative;z-index:50}
.header-inner{
  display:flex;align-items:center;gap:22px;
  height:var(--header-h);padding:0 14px 0 16px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-header);
}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;flex:0 0 auto}
.brand-mark img{display:block;width:32px;height:32px}
.brand-line{display:inline-flex;align-items:baseline;gap:9px}
.brand-en{font-family:var(--font-display);font-size:17px;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.brand-zh{
  font-size:12px;font-weight:500;letter-spacing:.08em;color:var(--ink-2);
  padding-left:9px;border-left:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:2px;margin-left:6px;min-width:0}
.nav-list{
  display:flex;align-items:center;gap:2px;
  list-style:none;margin:0;padding:0;
}
.nav-link{
  display:inline-flex;align-items:center;gap:5px;
  height:34px;padding:0 11px;border-radius:var(--r-sm);
  font-family:inherit;font-size:14px;letter-spacing:.01em;
  color:var(--ink-2);text-decoration:none;background:none;border:0;cursor:pointer;
  white-space:nowrap;
  transition:color .15s ease,background-color .15s ease;
}
.nav-link:hover{color:var(--ink);background:var(--indigo-06)}
.nav-link.is-active{color:var(--ink);font-weight:600;background:var(--indigo-08)}
.nav-more{position:relative;display:flex;align-items:center}
.nav-more-btn svg{color:var(--ink-2);flex:0 0 auto}
.nav-menu{
  position:absolute;top:calc(100% + 8px);left:0;z-index:30;
  min-width:176px;padding:6px;margin:0;
  list-style:none;
  display:flex;flex-direction:column;gap:2px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-float);
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .14s ease,transform .14s ease,visibility .14s;
}
.nav-menu li{margin:0}
.nav-more:hover .nav-menu,.nav-more:focus-within .nav-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav-menu a{
  display:block;padding:8px 10px;border-radius:var(--r-xs);
  font-size:13.5px;color:var(--ink-2);text-decoration:none;
}
.nav-menu a:hover{background:var(--indigo-06);color:var(--ink)}
.header-right{margin-left:auto;display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}

/* 语言切换 */
.lang{position:relative;display:inline-flex;align-items:center}
.lang-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  min-height:34px;padding:0 10px;border-radius:var(--r-sm);
  font-family:inherit;font-size:13px;color:var(--ink-2);
  background:none;border:1px solid transparent;cursor:pointer;white-space:nowrap;
}
.lang-btn:hover{border-color:var(--line);background:var(--panel)}
.lang-btn svg{color:var(--ink-2);flex:0 0 auto}
.lang-menu{
  position:absolute;top:calc(100% + 8px);right:0;z-index:30;
  min-width:150px;margin:0;padding:6px;list-style:none;
  display:flex;flex-direction:column;gap:2px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-float);
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .14s ease,transform .14s ease,visibility .14s;
}
.lang.is-open .lang-menu{opacity:1;visibility:visible;transform:translateY(0)}
.lang-menu li{margin:0}
.lang-menu a{
  display:flex;align-items:center;min-height:34px;padding:6px 10px;
  border-radius:var(--r-xs);font-size:13.5px;color:var(--ink-2);text-decoration:none;
}
.lang-menu a:hover{background:var(--indigo-06);color:var(--ink)}
.lang-menu a[aria-current="true"]{color:var(--indigo);font-weight:600;background:var(--indigo-06)}

/* 登录按钮（常驻转化入口） */
.login-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:36px;padding:0 18px;
  border-radius:var(--r-pill);border:1px solid var(--indigo);
  background:var(--panel);color:var(--indigo);
  font-size:14px;font-weight:600;letter-spacing:.02em;text-decoration:none;
  white-space:nowrap;
  transition:background-color .15s ease,color .15s ease;
}
.login-btn:hover{background:var(--indigo);color:var(--panel)}

/* 汉堡按钮（与工具区并列，绝不放进抽屉） */
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  min-width:44px;min-height:44px;padding:0;
  border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--panel);color:var(--ink);cursor:pointer;
}
.nav-toggle:hover{background:var(--indigo-06)}
.nav-toggle svg{flex:0 0 auto}

/* 抽屉与遮罩 */
.nav-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}

/* ============================ 页脚 ============================ */
.site-footer{
  margin-top:72px;
  border-top:1px solid var(--line);
  background-image:linear-gradient(180deg,var(--panel) 0%,var(--paper-deep) 100%);
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:36px;
  padding-block:52px 34px;
}
.footer-brand{display:flex;flex-direction:column;gap:12px;max-width:36ch;min-width:0}
.footer-brand .brand{margin-bottom:2px}
.footer-desc{font-size:14px;line-height:1.7;color:var(--ink-2);margin:0}
.footer-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--ink-2);
}
.footer-meta span{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  background:var(--panel);border:1px solid var(--line);
}
.footer-col{min-width:0}
.footer-col h3{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;color:var(--ink-2);margin:0 0 12px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.footer-col a{
  display:inline-flex;align-items:center;min-height:30px;
  font-size:14px;color:var(--ink-2);text-decoration:none;
}
.footer-col a:hover{color:var(--indigo)}
.footer-hot{
  display:flex;flex-wrap:wrap;gap:8px;
  padding-block:0 30px;
}
.footer-hot a{
  display:inline-flex;align-items:center;min-height:28px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--panel);color:var(--ink-2);
  font-size:12.5px;letter-spacing:.02em;text-decoration:none;
  max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.footer-hot a:hover{color:var(--indigo);border-color:var(--indigo-22)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
  padding-block:18px 28px;
  border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--ink-2);
}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px;text-decoration:none}
.footer-legal a:hover{color:var(--indigo)}
.footer-lang{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.footer-lang a{display:inline-flex;align-items:center;min-height:24px;text-decoration:none}
.footer-lang a:hover{color:var(--indigo)}

/* ============================ 通用面板 / 卡片 ============================ */
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-panel);
}
.panel-pad{padding:22px 24px}
.panel-2{background:var(--panel-2)}

/* ============================ reveal（可见性反转） ============================ */
.reveal{transition:opacity .5s ease,transform .5s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}

/* ============================ 计数数字（tabular-nums 防抖） ============================ */
.count{
  display:inline-block;
  min-width:3ch;
  text-align:center;
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}

/* ============================ 自适应 ============================ */
@media (max-width:1180px){
  .nav-link{padding:0 9px;font-size:13.5px}
  .header-inner{gap:14px}
}
@media (max-width:980px){
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-right{margin-left:auto}
  .header-inner{gap:10px;padding:0 10px 0 12px;height:58px}
  .brand-en{font-size:16px}

  .nav-drawer{
    display:flex;flex-direction:column;gap:2px;
    position:fixed;top:0;right:0;bottom:0;z-index:70;
    width:min(340px,88vw);
    padding:16px 16px calc(24px + env(safe-area-inset-bottom,0px));
    background:var(--panel);
    border-left:1px solid var(--line);
    box-shadow:var(--sh-device);
    overflow-y:auto;
    overscroll-behavior:contain;
    transform:translateX(102%);
    visibility:hidden;
    transition:transform .2s ease,visibility .2s ease;
  }
  html.nav-open .nav-drawer{transform:none;visibility:visible}
  .nav-drawer a{
    display:flex;align-items:center;width:100%;
    min-height:48px;padding:8px 12px;
    border-radius:var(--r-sm);
    font-size:15px;color:var(--ink);text-decoration:none;
  }
  .nav-drawer a:hover,.nav-drawer a:focus-visible{background:var(--indigo-06)}
  .nav-drawer a.is-active{background:var(--indigo-08);font-weight:600}
  .drawer-head{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:2px 4px 12px;margin-bottom:6px;
    border-bottom:1px dashed var(--line);
    font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--ink-2);
  }
  .drawer-close{
    display:inline-flex;align-items:center;justify-content:center;
    min-width:44px;min-height:44px;padding:0;
    border-radius:var(--r-sm);border:1px solid var(--line);
    background:var(--panel);color:var(--ink);cursor:pointer;
  }
  .drawer-sep{border-top:1px dashed var(--line);margin:10px 0}
  .drawer-label{
    padding:8px 12px 4px;
    font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--ink-2);
  }
  .nav-veil{
    display:block;position:fixed;inset:0;z-index:60;
    background:var(--veil);
    opacity:0;visibility:hidden;
    transition:opacity .2s ease,visibility .2s ease;
  }
  html.nav-open .nav-veil{opacity:1;visibility:visible}
}
@media (max-width:900px){
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-brand{grid-column:1 / -1;max-width:none}
}
@media (max-width:768px){
  :root{--gutter:18px}
  h1{font-size:clamp(28px,6.4vw,40px);line-height:1.16;letter-spacing:-.015em}
  h2{font-size:clamp(22px,5vw,30px)}
  .announce-link{font-size:12.5px}
  .site-footer{margin-top:56px}
  .footer-main{padding-block:40px 26px;gap:24px}
  .login-btn{padding:0 14px;font-size:13.5px}
}
@media (max-width:640px){
  .lang-label{display:none}
  .no-break{white-space:normal}
  .footer-main{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
  .btn{height:48px;font-size:15px}
}

/* ============================ 降低动效偏好 ============================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal,.reveal.pending{opacity:1;transform: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 */