/* 虎头科技品牌站 — 设计令牌取自 hutou-lockup.png 实测色阶。
 *
 * 两套皮肤共用一份令牌：
 *   .page-brand  品牌主页：纯黑、金色金属渐变、铭牌式排版，无动效主角
 *   .page-aurora 极光/接入页：粒子与幕帘在这里出现
 *
 * 中文排版三条硬规则：字距只用正值、行长用 em 不用 ch、不引任何外链字体。
 */

:root {
  /* gold ramp, sampled from the logo ink (L05→L95) */
  --g-deep: #8a6a1e;
  --g: #e8b355;
  --g-lit: #fdc95c;
  --g-pale: #fae17d;
  --g-hi: #fff6c0;
  --metal: linear-gradient(176deg, #fff6c0 2%, #fdc95c 34%, #b8862f 58%, #fae17d 82%, #fff6c0 100%);

  --void: #000000;
  --panel: #07070a;
  --ink: #f5f2e8;
  --muted: #b9b3a4;
  --faint: #8b8578;
  --line: rgba(232, 179, 85, .16);
  --line-strong: rgba(232, 179, 85, .38);
  --pending: #f0a870;
  --ok: #5fe3b8;
  --teal: #5fe3b8; --cyan: #68b2ff; --violet: #a87aff;

  --measure: 1120px;
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", Georgia, serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { background: var(--void); scroll-behavior: smooth; }
body {
  margin: 0; min-width: 320px;
  background: var(--void); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.9;
  letter-spacing: .02em;
  font-feature-settings: "palt" 1;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- shared chrome ---- */

.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 6;
  display: flex; align-items: center; gap: 20px;
  padding: 14px clamp(16px, 4.5vw, 56px);
  background: linear-gradient(180deg, rgba(0,0,0,.96) 24%, rgba(0,0,0,.6) 70%, transparent);
}
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.brand img { width: 30px; height: 33px; display: block; }
.brand-name { font-family: var(--serif); font-size: 18px; letter-spacing: .16em; }
.nav { margin-left: auto; display: flex; gap: clamp(12px, 2.4vw, 30px); font-size: 14px; letter-spacing: .1em; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--muted); text-decoration: none; padding: 6px 1px; border-bottom: 1px solid transparent; transition: color .18s, border-color .18s; }
.nav a:hover, .nav a:focus-visible { color: var(--g-lit); border-color: var(--line-strong); }

main { position: relative; z-index: 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; }
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 clamp(16px, 4.5vw, 56px); }
section { padding: clamp(64px, 11vh, 132px) 0; scroll-margin-top: 76px; }
.rule { height: 1px; border: 0; background: linear-gradient(90deg, transparent, var(--line-strong) 18%, var(--line-strong) 82%, transparent); }

.eyebrow { margin: 0 0 16px; font-size: 12px; letter-spacing: .3em; color: var(--g); text-transform: uppercase; }
.h2 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: clamp(26px, 3.6vw, 44px); line-height: 1.32; letter-spacing: .02em; text-wrap: balance; }
.h2 em { font-style: normal; color: var(--g-lit); }
.metal {
  font-family: var(--serif); font-weight: 400;
  background: var(--metal); -webkit-background-clip: text; background-clip: text; color: transparent;
}
/* clip-to-text is the only way the metal ramp shows; if a browser cannot
 * clip, fall back to a solid gold so the line never disappears. */
@supports not ((background-clip: text) or (-webkit-background-clip: text)) {
  .metal { background: none; color: var(--g-lit); }
}
.prose p { margin: 0 0 20px; color: var(--muted); max-width: 34em; text-wrap: pretty; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.quiet { font-size: 14px; color: var(--faint); line-height: 1.85; max-width: 44em; }
.split { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: clamp(22px, 5vw, 76px); align-items: start; }

.button { display: inline-flex; align-items: center; gap: 10px; min-height: 46px; padding: 0 20px; text-decoration: none; font-size: 15px; letter-spacing: .06em; border: 1px solid var(--line-strong); color: var(--g-lit); transition: background .2s, transform .2s, box-shadow .2s; }
.button small { font-size: 12px; letter-spacing: .04em; opacity: .72; }
/* Two-line button: the label stacks so a long CTA and a short one keep the
 * same footprint instead of one stretching and one shrinking. */
.button-stack { flex-direction: column; align-items: flex-start; justify-content: center; gap: 1px; padding: 10px 22px; line-height: 1.28; }
.button-stack .b-top { font-size: 17px; letter-spacing: .08em; }
.button-stack .b-sub { font-size: 14px; letter-spacing: .04em; opacity: .82; }
.nameplate-actions { align-items: stretch; }
.actions-note { margin: 14px 0 0; font-size: 13px; letter-spacing: .06em; color: var(--faint); }
.button:hover { background: rgba(232, 179, 85, .08); transform: translateY(-1px); }
.button-solid { background: var(--metal); color: #0a0805; border-color: transparent; font-weight: 600; }
.button-solid:hover { background: var(--metal); box-shadow: 0 6px 26px rgba(232, 179, 85, .22); }

/* ---- 01 铭牌 hero ---- */

.nameplate { padding: clamp(104px, 17vh, 190px) 0 clamp(56px, 9vh, 104px); text-align: center; }
.nameplate img { width: min(760px, 84vw); height: auto; display: block; margin: 0 auto; }
.nameplate .claim { margin: clamp(26px, 4vh, 44px) auto 0; max-width: 30em; font-family: var(--serif); font-size: clamp(18px, 2.1vw, 25px); line-height: 1.75; letter-spacing: .04em; }
.nameplate .under { margin: 14px auto 0; max-width: 40em; color: var(--faint); font-size: 15px; }
.nameplate-actions { margin-top: clamp(26px, 4vh, 40px); display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---- 02 产品与服务目录 ---- */

.catalog { margin: clamp(30px, 4vh, 48px) 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.catalog li { display: grid; grid-template-columns: minmax(0, 190px) minmax(0, 1fr) auto; gap: clamp(14px, 3vw, 40px); align-items: baseline; padding: 26px 4px; border-bottom: 1px solid var(--line); }
.catalog .k { font-family: var(--serif); font-size: clamp(19px, 2vw, 23px); letter-spacing: .06em; color: var(--ink); }
.catalog .k small { display: block; margin-top: 6px; font-family: var(--mono); font-size: 12px; letter-spacing: .16em; color: var(--g-deep); }
.catalog .d { color: var(--muted); font-size: 15px; max-width: 40em; }
.catalog .s { font-size: 13px; letter-spacing: .12em; color: var(--faint); white-space: nowrap; }
.catalog .s.soon { color: var(--pending); }

/* ---- 03 开发者 / 愿景 ---- */

.pull { margin: 0 0 clamp(30px, 4vh, 48px); max-width: 42em; }
.pull p { margin: 0; padding-left: 1.05em; position: relative; font-family: var(--serif); font-weight: 400; font-size: clamp(21px, 3vw, 36px); line-height: 1.58; letter-spacing: .03em; text-wrap: balance; }
.pull p::before { content: "\201C"; position: absolute; left: 0; top: .02em; font-size: 1.5em; color: var(--g); opacity: .8; }
.idcard { padding-left: clamp(16px, 2.2vw, 26px); border-left: 1px solid var(--line-strong); }
.idline { margin: 0; font-family: var(--serif); font-size: clamp(21px, 2.4vw, 28px); letter-spacing: .05em; }
.idsub { margin: 8px 0 0; color: var(--muted); font-size: 15px; letter-spacing: .1em; }
.motto-label { margin: clamp(22px, 3vh, 34px) 0 8px; font-size: 12px; letter-spacing: .24em; color: var(--faint); }
.motto { margin: 0; font-family: var(--mono); font-size: clamp(15px, 1.5vw, 17px); color: var(--g-lit); letter-spacing: .04em; line-height: 1.7; }
.cards { list-style: none; margin: clamp(30px, 4vh, 46px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.card { background: var(--panel); padding: 24px 22px 26px; }
.card-k { display: block; margin-bottom: 10px; font-size: 12px; letter-spacing: .22em; color: var(--g); text-transform: uppercase; }
.card p { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.85; }

/* ---- tables ---- */

.data { width: 100%; margin-top: clamp(24px, 3.4vh, 40px); border-collapse: collapse; font-size: 15px; }
.data caption { caption-side: top; text-align: left; padding-bottom: 12px; font-size: 12px; letter-spacing: .16em; color: var(--g); text-transform: uppercase; }
.data th, .data td { padding: 12px 12px 12px 0; border-bottom: 1px solid rgba(255,255,255,.07); text-align: left; }
.data thead th { font-size: 13px; font-weight: 500; letter-spacing: .1em; color: var(--faint); border-bottom-color: var(--line-strong); }
.data td { color: var(--muted); }
.data .num { font-family: var(--mono); color: var(--ink); font-variant-numeric: tabular-nums; text-align: right; padding-right: 0; white-space: nowrap; }
.data tbody tr:last-child td { border-bottom-color: transparent; }
.data .pending { color: var(--pending); font-size: 14px; letter-spacing: .06em; }
.code { margin: 20px 0; padding: 18px 20px; overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
.code code { font-family: var(--mono); font-size: 13.5px; line-height: 1.75; color: #dfe4ee; white-space: pre; }

/* ---- footer ---- */

.footer { border-top: 1px solid var(--line); padding: 34px 0 52px; margin-top: clamp(30px, 5vh, 60px); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 10px 26px; justify-content: space-between; align-items: baseline; font-size: 14px; color: var(--faint); letter-spacing: .06em; }
.footer a { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; }
.footer a:hover { color: var(--g-lit); border-color: var(--line-strong); }
.footer-motto { font-family: var(--mono); color: var(--g-lit); letter-spacing: .04em; }
.footer-legal { margin-top: 18px; font-size: 13px; color: var(--faint); letter-spacing: .04em; }

/* ---- aurora skin (技术/接入页) ---- */

.page-aurora { background: radial-gradient(120% 90% at 50% -10%, #0a1226 0%, #04060f 58%); }
#aurora-field { position: fixed; inset: 0; z-index: 0; width: 100%; height: 100%; }
.page-aurora main, .page-aurora .topbar { position: relative; }
.page-aurora .topbar { background: linear-gradient(180deg, rgba(4,6,15,.92) 20%, transparent); }
.aurora-hero { min-height: clamp(520px, 84vh, 880px); display: grid; align-content: end; padding: 24vh 0 10vh; }
.aurora-hero .lede { margin: 0; max-width: 30em; color: var(--muted); font-size: clamp(16px, 1.5vw, 18px); }
.morph-caption { display: inline-flex; align-items: center; gap: 10px; margin-top: 26px; font-size: 13px; letter-spacing: .1em; color: var(--faint); }
.morph-caption .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); }

/* ---- motion ---- */

.js [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .85s cubic-bezier(.22,.61,.36,1), transform .85s cubic-bezier(.22,.61,.36,1); }
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (max-width: 760px) {
  body { line-height: 1.85; }
  .split { grid-template-columns: 1fr; gap: 24px; }
  .catalog li { grid-template-columns: 1fr; gap: 8px; padding: 22px 2px; }
  .catalog .s { order: 3; }
  .idcard { margin-bottom: 30px; }
  .nameplate img { width: 92vw; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .button:hover { transform: none; }
}

/* ---- key claiming (接入页) ---- */

.btn { min-height: 42px; padding: 0 18px; background: transparent; border: 1px solid var(--line-strong); color: var(--g-lit); font: inherit; font-size: 15px; letter-spacing: .08em; cursor: pointer; }
.btn:hover { background: rgba(232, 179, 85, .1); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-solid { background: var(--metal); color: #0a0805; border-color: transparent; font-weight: 600; }
.btn-mini { min-height: 34px; font-size: 13px; }
.keybar { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: clamp(26px, 4vh, 40px); }
.status { font-size: 14px; letter-spacing: .08em; color: var(--faint); }
.status::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 9px; background: currentColor; vertical-align: 1px; }
.status[data-state="ok"] { color: var(--ok); }
.status[data-state="err"] { color: var(--pending); }
.keyrow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 16px; }
.keyrow code { flex: 0 1 auto; max-width: 100%; padding: 11px 13px; border: 1px solid var(--line); background: rgba(5, 7, 15, .8); font-family: var(--mono); font-size: 13px; letter-spacing: .04em; color: var(--g-hi); cursor: pointer; }
.keyrow code[data-shown="full"] { border-color: var(--line-strong); overflow-wrap: anywhere; }
.usageline { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 18px 0 0; font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
.usageline:empty { display: none; }
.usageline .bar { flex: 0 0 120px; height: 3px; background: rgba(255, 255, 255, .1); }
.usageline .bar b { display: block; height: 100%; background: var(--metal); }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 200px; }
.field > span { font-size: 12px; letter-spacing: .12em; color: var(--faint); }
.field input { background: #05070f; color: var(--ink); border: 1px solid var(--line); padding: 10px 12px; font-family: var(--mono); font-size: 14px; }
.field input:focus-visible { outline: none; border-color: var(--line-strong); }

/* ---- page transition veil ---- */

.veil { position: fixed; inset: 0; z-index: 20; pointer-events: none; transform-origin: 50% 50%;
  background: linear-gradient(180deg, rgba(4, 6, 15, .96), rgba(232, 179, 85, .07) 46%, rgba(4, 6, 15, .96)); }

/* ---- 开发者控制台皮肤（接入页） -------------------------------------------
 * 前景是信息密度：状态条、用量环、请求 / 响应台、可复制代码片段。
 * 极光粒子退到背景当氛围，不再和正文抢视线。
 */

.page-console #aurora-field { opacity: .5; }
.page-console .topbar { background: linear-gradient(180deg, rgba(4, 6, 15, .94) 26%, rgba(4, 6, 15, .55) 74%, transparent); }

/* hidden 属性优先于类上的 display（.keybar / .keyrow 都是 flex） */
.page-console [hidden] { display: none !important; }

/* masthead：一行说清这是什么，然后立刻上状态条 */
.console-hero { padding: clamp(116px, 18vh, 182px) 0 clamp(26px, 4vh, 46px); }
.console-title { margin: 0; font-size: clamp(32px, 5.6vw, 62px); line-height: 1.08; letter-spacing: .04em; }
.console-sub { margin: 16px 0 0; max-width: 44em; color: var(--muted); font-size: clamp(15px, 1.4vw, 17px); }

.strip { margin-top: clamp(24px, 3.6vh, 40px); display: grid; grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.strip-item { background: rgba(6, 7, 12, .84); padding: 13px 15px 15px; }
.strip-k { display: block; font-size: 11px; letter-spacing: .2em; color: var(--faint); text-transform: uppercase; }
.strip-v { display: block; margin-top: 7px; font-family: var(--mono); font-size: 16px; letter-spacing: .02em; color: var(--ink); font-variant-numeric: tabular-nums; }
.strip-v[data-state="ok"] { color: var(--ok); }
.strip-v[data-state="warn"] { color: var(--pending); }

/* 两栏工作台：左 key + 用量，右试用台 */
.console-grid { display: grid; grid-template-columns: minmax(0, .84fr) minmax(0, 1.36fr); gap: clamp(16px, 2.4vw, 26px); align-items: start; }
.panel { background: linear-gradient(180deg, rgba(9, 10, 16, .92), rgba(5, 6, 11, .92)); border: 1px solid var(--line); padding: clamp(18px, 2.2vw, 26px); }
.panel-h { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px; margin: 0 0 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.panel-n { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; color: var(--g-deep); }
.panel-t { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 19px; letter-spacing: .12em; color: var(--ink); }
.panel-h .status, .panel-h .play-ctl { margin-left: auto; }
.panel-note { margin: 16px 0 0; font-size: 13px; line-height: 1.8; color: var(--faint); }
.panel .keybar { margin-top: 14px; }
.panel .keyrow { margin-top: 14px; }

/* 用量环 */
.usage { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: clamp(16px, 2.2vw, 28px); align-items: center; margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.ring-wrap { position: relative; width: 132px; height: 132px; }
.ring { display: block; width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 6; }
.ring-bg { stroke: rgba(255, 255, 255, .09); }
.ring-fg { stroke: url(#ring-ramp); stroke-linecap: round; stroke-dasharray: 100; stroke-dashoffset: 100; transition: stroke-dashoffset .7s cubic-bezier(.22, .61, .36, 1); }
.ring-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.ring-center b { font-family: var(--mono); font-size: 25px; color: var(--g-lit); font-variant-numeric: tabular-nums; }
.ring-center span { display: block; margin-top: 4px; font-size: 11px; letter-spacing: .18em; color: var(--faint); }
.usage-facts { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px 18px; }
.usage-facts > div { border-top: 1px solid rgba(255, 255, 255, .07); padding-top: 9px; }
.usage-facts dt { font-size: 11px; letter-spacing: .18em; color: var(--faint); text-transform: uppercase; }
.usage-facts dd { margin: 5px 0 0; font-family: var(--mono); font-size: 15px; color: var(--ink); font-variant-numeric: tabular-nums; }
.usage-facts dd.is-fee { color: var(--g-lit); }

/* 试用台控件 */
.play-ctl { display: flex; align-items: center; gap: 14px;}
.select { position: relative; display: inline-flex; align-items: center; }
.select select { appearance: none; -webkit-appearance: none; background: #05070f; color: var(--ink); border: 1px solid var(--line); font-family: var(--mono); font-size: 13px; letter-spacing: .04em; padding: 8px 32px 8px 12px; cursor: pointer; }
.select select:focus-visible { outline: none; border-color: var(--line-strong); }
.select::after { content: "\25BE"; position: absolute; right: 12px; font-size: 10px; color: var(--g); pointer-events: none; }
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: .08em; color: var(--muted); cursor: pointer; user-select: none; white-space: nowrap; }
.switch input { appearance: none; -webkit-appearance: none; width: 34px; height: 18px; margin: 0; border-radius: 999px; border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .06); position: relative; cursor: pointer; transition: background .2s; }
.switch input::after { content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%; background: var(--faint); transition: transform .2s, background .2s; }
.switch input:checked { background: rgba(232, 179, 85, .26); }
.switch input:checked::after { transform: translateX(16px); background: var(--g-lit); }
.switch input:focus-visible { outline: 1px solid var(--line-strong); outline-offset: 2px; }

.preset-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.chip { background: transparent; border: 1px solid var(--line); color: var(--muted); font: inherit; font-size: 13px; letter-spacing: .04em; padding: 7px 13px; cursor: pointer; transition: color .18s, border-color .18s, background .18s; }
.chip:hover { color: var(--g-lit); border-color: var(--line-strong); background: rgba(232, 179, 85, .06); }

/* 请求 / 响应 */
.chat { border: 1px solid var(--line); background: rgba(3, 4, 9, .74); padding: 16px; min-height: 236px; max-height: 420px; overflow-y: auto; scrollbar-width: thin; }
.chat-empty { margin: 0; font-size: 14px; letter-spacing: .04em; color: var(--faint); }
.msg { margin: 0 0 16px; }
.msg:last-child { margin-bottom: 0; }
.msg-role { display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--faint); }
.msg-user .msg-role { color: var(--g); }
.msg-ai .msg-role { color: var(--teal); }
.msg-body { margin: 8px 0 0; font-size: 15px; line-height: 1.85; color: var(--ink); white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.is-err .msg-body { color: var(--pending); }
.msg-meta { margin: 9px 0 0; font-family: var(--mono); font-size: 12px; letter-spacing: .02em; color: var(--faint); }
.msg-meta:empty { display: none; }
.caret { display: inline-block; width: 8px; height: 15px; margin-left: 2px; background: var(--teal); vertical-align: -2px; animation: caret 1s steps(2, start) infinite; }
@keyframes caret { 50% { opacity: 0; } }

.composer { margin-top: 14px; }
.composer textarea { display: block; width: 100%; min-height: 84px; resize: vertical; background: #05070f; color: var(--ink); border: 1px solid var(--line); padding: 12px 14px; font: inherit; font-size: 15px; line-height: 1.7; }
.composer textarea:focus-visible { outline: none; border-color: var(--line-strong); }
.composer-actions { display: flex; align-items: center; gap: 14px; margin-top: 12px; }
.composer-actions .meta { margin-right: auto; font-family: var(--mono); font-size: 12px; letter-spacing: .02em; color: var(--faint); }

/* 代码片段 */
.console-code, .console-ref { padding: clamp(48px, 8vh, 92px) 0; }
.console-ref { padding-bottom: clamp(20px, 4vh, 44px); }
.codetabs { display: flex; flex-wrap: wrap; gap: 4px; }
.codetab { background: transparent; border: 1px solid transparent; border-bottom-color: var(--line); color: var(--faint); font: inherit; font-family: var(--mono); font-size: 13px; letter-spacing: .06em; padding: 9px 16px; cursor: pointer; transition: color .18s, border-color .18s, background .18s; }
.codetab:hover { color: var(--muted); }
.codetab.is-active { color: var(--g-lit); border-color: var(--line); border-bottom-color: transparent; background: rgba(6, 7, 12, .92); }
.codeblock { position: relative; border: 1px solid var(--line); border-top: 0; }
.codeblock .code { margin: 0; border: 0; background: rgba(3, 4, 9, .86); }
.codecopy { position: absolute; top: 10px; right: 10px; z-index: 2; background: rgba(5, 7, 15, .86); }
.codehint { margin: 14px 0 0; font-size: 13px; color: var(--faint); }

/* 精简参考 */
.refcols { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: clamp(16px, 2.4vw, 26px); margin-top: clamp(24px, 3.4vh, 40px); }
.refbox { border: 1px solid var(--line); background: rgba(6, 7, 12, .72); padding: 20px 22px 22px; }
.refbox h3 { margin: 0 0 14px; font-family: var(--serif); font-weight: 400; font-size: 16px; letter-spacing: .14em; color: var(--ink); }
.refdl { margin: 0; display: grid; gap: 11px; }
.refdl > div { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; padding-bottom: 10px; border-bottom: 1px solid rgba(255, 255, 255, .06); }
.refdl > div:last-child { padding-bottom: 0; border-bottom: 0; }
.refdl dt { font-size: 13px; letter-spacing: .04em; color: var(--muted); }
.refdl dd { margin: 0; font-family: var(--mono); font-size: 13px; color: var(--ink); white-space: nowrap; font-variant-numeric: tabular-nums; }
.refdl dd.pending { color: var(--pending); }
.chiplist { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chiplist li { border: 1px solid var(--line); padding: 8px 13px; font-size: 13px; letter-spacing: .04em; color: var(--muted); }
.chiplist li b { display: block; margin-bottom: 4px; font-weight: 400; font-size: 11px; letter-spacing: .16em; color: var(--g); text-transform: uppercase; }

@media (max-width: 980px) {
  .console-grid { grid-template-columns: 1fr; }
  .usage { grid-template-columns: 116px minmax(0, 1fr); }
  .ring-wrap { width: 116px; height: 116px; }
}

@media (max-width: 640px) {
  .strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .usage { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .usage-facts { width: 100%; text-align: left; }
  .play-ctl { margin-left: 0; width: 100%; }
  .chat { max-height: 340px; }
  .codecopy { top: 8px; right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .ring-fg { transition: none; }
  .caret { animation: none; }
  .chip, .switch input, .switch input::after, .codetab { transition: none; }
}

/* ---- 账号页（登录 / 注册） -------------------------------------------------
 * 常规表单页：居中窄卡、两枚 tab 切换登录与注册，注册多一步邮箱验证码。
 * 不承载营销文案，登录后才展开账号信息与 key 管理。
 */

.page-account [hidden] { display: none !important; }

.auth-section { padding: clamp(104px, 16vh, 168px) 0 clamp(40px, 6vh, 72px); }
#keys { max-width: 760px; margin: 0 auto; padding-top: 0; }

.auth-card {
  width: 100%; max-width: 440px; margin: 0 auto;
  background: linear-gradient(180deg, rgba(9, 10, 16, .94), rgba(5, 6, 11, .94));
  border: 1px solid var(--line); padding: clamp(26px, 3.4vw, 36px);
}
.auth-title { margin: 0 0 22px; font-family: var(--serif); font-weight: 400; font-size: 22px; letter-spacing: .1em; }
.auth-tabs { display: flex; gap: 2px; margin-bottom: 20px; border-bottom: 1px solid var(--line); }
.auth-tab {
  flex: 1; background: transparent; border: 0; border-bottom: 2px solid transparent;
  color: var(--faint); font: inherit; font-size: 15px; letter-spacing: .14em;
  padding: 12px 0; cursor: pointer; transition: color .18s, border-color .18s;
}
.auth-tab:hover { color: var(--muted); }
.auth-tab.is-active { color: var(--g-lit); border-bottom-color: var(--g); }
.auth-tab:focus-visible { outline: 1px solid var(--line-strong); outline-offset: -2px; }
.auth-hint { margin: 0 0 20px; font-size: 13px; color: var(--faint); line-height: 1.8; }

.afield { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }
.afield > span { font-size: 12px; letter-spacing: .12em; color: var(--faint); }
.afield input {
  width: 100%; background: #05070f; color: var(--ink);
  border: 1px solid var(--line); padding: 12px 13px; font-size: 15px;
}
.afield input:focus-visible { outline: none; border-color: var(--line-strong); }
.afield-row { display: flex; gap: 10px; }
.afield-row input { flex: 1 1 auto; min-width: 0; font-family: var(--mono); letter-spacing: .22em; }
.afield-row .btn { flex: 0 0 auto; white-space: nowrap; }
.btn-block { width: 100%; margin-top: 8px; }
.auth-card .status { margin: 14px 0 0; min-height: 1.4em; }
.auth-card .status:empty { display: none; }

.account-info { margin: 0 0 24px; display: grid; gap: 12px; }
.account-info > div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding-bottom: 11px; border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.account-info > div:last-child { padding-bottom: 0; border-bottom: 0; }
.account-info dt { font-size: 13px; letter-spacing: .06em; color: var(--faint); }
.account-info dd { margin: 0; font-size: 14px; color: var(--ink); overflow-wrap: anywhere; }
.account-info #who { font-family: var(--mono); }

@media (max-width: 480px) {
  .afield-row { flex-wrap: wrap; }
  .afield-row .btn { width: 100%; }
}