/* ============================================================
   base.css — 只管结构与排版骨架，所有装饰交给 theme-*.css
   ============================================================ */

@font-face { font-family:'Plex Sans'; src:url('fonts/plex-sans-400.woff2') format('woff2'); font-weight:400; font-display:swap; }
@font-face { font-family:'Plex Sans'; src:url('fonts/plex-sans-500.woff2') format('woff2'); font-weight:500; font-display:swap; }
@font-face { font-family:'Plex Sans'; src:url('fonts/plex-sans-600.woff2') format('woff2'); font-weight:600; font-display:swap; }
@font-face { font-family:'Plex Mono'; src:url('fonts/plex-mono-400.woff2') format('woff2'); font-weight:400; font-display:swap; }
@font-face { font-family:'Plex Mono'; src:url('fonts/plex-mono-500.woff2') format('woff2'); font-weight:500; font-display:swap; }
@font-face { font-family:'Plex Mono'; src:url('fonts/plex-mono-600.woff2') format('woff2'); font-weight:600; font-display:swap; }
@font-face { font-family:'Sora'; src:url('fonts/sora-700.woff2') format('woff2'); font-weight:700; font-display:swap; }
@font-face { font-family:'Instrument Serif'; src:url('fonts/instrument-serif-400.woff2') format('woff2'); font-weight:400; font-display:swap; }
@font-face { font-family:'Archivo'; src:url('fonts/archivo-500.woff2') format('woff2'); font-weight:500; font-display:swap; }
@font-face { font-family:'Archivo'; src:url('fonts/archivo-700.woff2') format('woff2'); font-weight:700; font-display:swap; }

:root {
  --cjk: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC';
  --w: 940px;
  --pad: clamp(1.25rem, 4vw, 2rem);
  --radius: 7px;
  --radius-lg: 10px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 400 15.5px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; }
code, kbd, pre { font-family: var(--mono); }
.mono { font-family: var(--mono); }
.num  { font-variant-numeric: tabular-nums; }

a { color: var(--acc); text-decoration: underline; text-underline-offset: 3px;
    text-decoration-color: var(--acc-line); transition: color .15s, text-decoration-color .15s; }
a:hover { color: var(--acc-2); text-decoration-color: var(--acc); }

.wrap { width: 100%; max-width: var(--w); margin-inline: auto; padding-inline: var(--pad); }

/* ---------- 顶栏：全宽，logo + 平铺导航 ---------- */

.top { border-bottom: 1px solid var(--line); background: var(--bg); }
/* 顶栏铺满视口，两端贴边，把中间的空间全留给导航 */
.top .wrap {
  display: grid;
  grid-template-columns: 1fr auto 1fr;   /* 导航居中，不受两侧宽度影响 */
  align-items: center;
  gap: 1rem;
  height: 62px;
  max-width: none;
  padding-inline: clamp(.9rem, 1.6vw, 1.5rem);
}
.top .wrap > .brand { justify-self: start; }
.top-right { justify-self: end; }

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  font: 700 21px/1 var(--display);
  letter-spacing: -.05em;
  transition: opacity .15s;
}
.brand:hover { text-decoration: none; opacity: .68; }
.brand svg { width: 21px; height: 21px; color: var(--acc); flex: none; }

.nav {
  display: flex;
  align-items: center;
  gap: .2rem;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav::-webkit-scrollbar { display: none; }

.nav a {
  flex: none;
  padding: .48rem .68rem;
  border-radius: 8px;
  font: 400 15px/1 var(--sans);
  letter-spacing: -.012em;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.nav a:hover { background: var(--bar-bg); color: var(--ink); }

/* 选中：整块底色 + 主色文字，一眼可辨 */
.nav a[aria-current] {
  background: var(--acc-dim);
  color: var(--acc-2);
  box-shadow: inset 0 0 0 1px var(--acc-line);
}
.nav a[aria-current]:hover { background: var(--acc-dim); color: var(--acc-2); }

/* 分隔：接口文档与产品项之间 */
.nav .sep { flex: none; width: 1px; height: 18px; margin-inline: .55rem; background: var(--line-2); }

/* ---------- 产品平铺网格 ---------- */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: .85rem;
}
.tile {
  display: block;
  padding: 1.15rem 1.25rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--panel-shadow);
  color: inherit;
  text-decoration: none;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}
.tile:hover {
  border-color: var(--acc-line);
  box-shadow: var(--panel-shadow-h);
  transform: translateY(-2px);
  text-decoration: none;
}
.tile .plat {
  display: inline-block;
  margin-bottom: .6rem;
  padding: .2rem .55rem;
  border-radius: 100px;
  background: var(--acc-dim);
  color: var(--acc-2);
  font: 600 11.5px/1.5 var(--sans);
}
.tile h3 { font-size: 16px; font-weight: 600; color: var(--ink); letter-spacing: -.012em; }
.tile .path { display: block; margin-top: .5rem; font: 400 12.5px/1.5 var(--mono); color: var(--ink-3); }

/* ---------- 产品下拉大面板 ---------- */

.top { position: relative; }
.nav-item { position: relative; display: inline-flex; }

/* 宽度与内容容器一致：左缘对齐 PriceApi，右缘对齐登录按钮 */
.mega {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 100%;
  max-width: var(--w);
  padding: 12px var(--pad) 0;     /* 上方是悬停缓冲，左右与 .wrap 对齐 */
  z-index: 60;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px) scale(.99);
  transform-origin: top center;
  transition: opacity .18s ease, transform .22s cubic-bezier(.2,.9,.25,1), visibility .22s;
}
.mega.open {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0) scale(1);
}

.mega-inner {
  display: grid;
  grid-template-columns: 264px 1fr;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg);
  box-shadow: 0 4px 12px rgba(20, 24, 26, .06), 0 24px 60px rgba(20, 24, 26, .14);
  overflow: hidden;
}

/* 左栏：整块浅底 + 一条明确的分割线 */
.mega-cats {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: .75rem 0 .75rem .75rem;
  background: var(--mega-side);
  border-right: 1px solid var(--line-2);
}
.mega-cats button {
  appearance: none;
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  margin-right: -1px;                 /* 选中态压住分割线，与右侧连成一片 */
  padding: .95rem 1.1rem;
  border: 0;
  border-radius: 11px 0 0 11px;
  background: transparent;
  color: var(--ink-2);
  font: 500 17px/1.35 var(--sans);
  letter-spacing: -.01em;
  text-align: left;
  cursor: pointer;
  transition: background .16s, color .16s;
}
.mega-cats button:hover { color: var(--ink); background: rgba(20, 24, 26, .045); }
.mega-cats button[aria-selected="true"] {
  background: var(--bg);
  color: var(--acc-2);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--acc);
}
.mega-cats button[aria-selected="true"]:hover { background: var(--bg); }

/* 右栏 */
.mega-panels { padding: .75rem; }
.mega-panel[hidden] { display: none; }

.mega-link {
  display: flex;
  align-items: center;
  padding: .95rem 1.1rem;
  border-radius: 11px;
  color: var(--ink);
  font: 500 16.5px/1.4 var(--sans);
  letter-spacing: -.01em;
  text-decoration: none;
  transition: background .16s, color .16s;
}
.mega-link::after {
  content: '→';
  margin-left: auto;
  padding-left: 1rem;
  color: var(--acc);
  font-size: 15px;
  opacity: 0;
  transform: translateX(-5px);
  transition: opacity .18s, transform .18s cubic-bezier(.2,.9,.25,1);
}
.mega-link:hover { background: var(--acc-dim); color: var(--acc-2); text-decoration: none; }
.mega-link:hover::after { opacity: 1; transform: none; }

@media (max-width: 760px) {
  .mega { display: none; }
}

/* ---------- 状态灯 ---------- */

.status { display: inline-flex; align-items: center; gap: .45rem; font-size: 13px; color: var(--ink-3); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-4); flex: none; }
.dot.on  { background: var(--up);   box-shadow: 0 0 0 3px color-mix(in srgb, var(--up) 18%, transparent); }
.dot.off { background: var(--down); box-shadow: 0 0 0 3px color-mix(in srgb, var(--down) 18%, transparent); }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  height: 36px; padding: 0 1rem;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  font: 500 14px/1 var(--sans);
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: border-color .15s, background .15s, transform .18s, box-shadow .18s;
}
.btn:hover { border-color: var(--ink); text-decoration: none; }
.btn-sig {
  background: var(--btn-bg); border-color: var(--btn-bg); color: var(--btn-fg);
  box-shadow: var(--btn-shadow);
}
.btn-sig:hover {
  background: var(--btn-bg-h); border-color: var(--btn-bg-h); color: var(--btn-fg);
  transform: translateY(-1px); box-shadow: var(--btn-shadow-h);
}
.btn-sig:active { transform: translateY(0); }
.btn-lg { height: 42px; padding: 0 1.35rem; }
.btn-sm { height: 30px; padding: 0 .7rem; font-size: 13px; }
.top-right .btn { height: 38px; padding: 0 1.2rem; font-size: 14.5px; }

/* ---------- 区块 ---------- */

.sec { padding: clamp(2.5rem, 6vw, 3.75rem) 0; }
.sec-head {
  display: flex; align-items: baseline; gap: .85rem;
  margin-bottom: 1.5rem; padding-bottom: .7rem;
  border-bottom: var(--head-rule);
}
.sec-head .idx { font: 600 12.5px/1 var(--mono); color: var(--acc); flex: none; }
.sec-head h2 { font-size: 1.22rem; flex: none; letter-spacing: -.015em; }
.sec-head .rule { flex: 1; }
.sec-head .note { font: 400 12.5px/1 var(--mono); color: var(--ink-3); flex: none; }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  padding: clamp(3rem, 7vw, 4.75rem) 0 clamp(2.25rem, 5vw, 3.25rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero > .wrap { position: relative; z-index: 1; }

.hero-kicker { display: inline-flex; align-items: center; gap: .5rem; margin-bottom: 1.1rem; }

.hero h1 {
  font: var(--h1-font);
  line-height: 1.16;
  letter-spacing: -.025em;
  max-width: 20ch;
}
.hero h1 em { font-style: normal; color: var(--h1-em); }
.hero p.lead { margin: 1.05rem 0 0; max-width: 56ch; color: var(--ink-2); font-size: 16px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.75rem; }

/* ---------- 指标 ---------- */

.readout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: var(--readout-gap);
  margin-top: clamp(2rem, 5vw, 2.75rem);
}
.readout div { position: relative; padding: var(--card-pad); }
.readout dt { font-size: 12.5px; color: var(--ink-3); }
.readout dd {
  margin: .4rem 0 0;
  font: 500 1.3rem/1.2 var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}
.readout dd small { font-size: .6em; color: var(--ink-3); font-weight: 400; margin-left: .15em; }

/* ---------- 代码 ---------- */

.code { border: var(--panel-border); border-radius: var(--radius); background: var(--panel-bg); overflow: hidden; box-shadow: var(--panel-shadow); }
.code-bar {
  display: flex; align-items: center; gap: .6rem;
  padding: .5rem .9rem;
  border-bottom: var(--panel-border);
  background: var(--bar-bg);
  font-size: 12.5px; color: var(--ink-3);
}
.code-bar .copy { margin-left: auto; }
.code pre {
  margin: 0; padding: .9rem 1rem; overflow-x: auto;
  font-size: 13px; line-height: 1.75; color: var(--ink);
}
.code pre .c-key { color: var(--ink); font-weight: 500; }
.code pre .c-str { color: var(--c-str); }
.code pre .c-num { color: var(--c-num); }
.code pre .c-dim { color: var(--ink-4); }

/* ---------- 表格 ---------- */

.table-wrap { overflow-x: auto; }
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 520px; }
.table-wrap thead th {
  padding: .55rem .75rem .6rem 0; text-align: left;
  border-bottom: var(--head-rule);
  font: 600 12.5px/1 var(--sans); color: var(--ink); white-space: nowrap;
}
.table-wrap tbody td {
  padding: .7rem .75rem; padding-left: 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px; color: var(--ink-2);
}
.table-wrap tbody tr { transition: background .14s; }
.table-wrap tbody tr:hover { background: var(--row-hover); }
.table-wrap td.name { color: var(--ink); }
.table-wrap td.n, .table-wrap th.n {
  text-align: right; padding-right: 0;
  font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--ink);
}
.table-wrap th.n { font-family: var(--sans); }

/* ---------- 接口条目 ---------- */

.ep { border: var(--panel-border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--panel-shadow); transition: border-color .18s, box-shadow .18s; }
.ep:hover { border-color: var(--acc-line); box-shadow: var(--panel-shadow-h); }
.ep + .ep { margin-top: .85rem; }
.ep-head {
  display: flex; align-items: center; gap: .7rem; flex-wrap: wrap;
  padding: .7rem .95rem; border-bottom: var(--panel-border); background: var(--bar-bg);
}
.method {
  padding: .18rem .5rem;
  border: 1px solid var(--acc-line); border-radius: 4px;
  background: var(--acc-dim);
  font: 600 11.5px/1.4 var(--mono); color: var(--acc-2);
}
.ep-head .path { font: 500 13.5px/1 var(--mono); color: var(--ink); }
.ep-head .auth { margin-left: auto; font-size: 12.5px; color: var(--ink-3); }
.ep-body { padding: 1rem .95rem; }
.ep-body > p { margin: 0 0 .9rem; color: var(--ink-2); font-size: 14.5px; }

.params { width: 100%; border-collapse: collapse; margin: 0 0 1rem; }
.params th, .params td { padding: .45rem .75rem .45rem 0; text-align: left; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.params th { font: 500 12.5px/1 var(--sans); color: var(--ink-3); }
.params td:first-child { font-family: var(--mono); color: var(--ink); white-space: nowrap; }
.params td:nth-child(2) { font-family: var(--mono); color: var(--ink-3); white-space: nowrap; }
.params td:last-child { color: var(--ink-2); }
.params tr:last-child td { border-bottom: 0; }

/* ---------- 产品目录：左分类 / 右接口 ---------- */

.catalog {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.cat-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: sticky;
  top: 84px;
}
.cat-list button {
  appearance: none;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  width: 100%;
  padding: .7rem .85rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-2);
  font: 500 15px/1.3 var(--sans);
  text-align: left;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.cat-list button .n {
  margin-left: auto;
  font: 500 11.5px/1 var(--mono);
  color: var(--ink-4);
}
.cat-list button:hover { background: var(--bar-bg); color: var(--ink); }
.cat-list button[aria-selected="true"] {
  background: var(--acc-dim);
  border-color: var(--acc-line);
  color: var(--acc-2);
  font-weight: 600;
}
.cat-list button[aria-selected="true"] .n { color: var(--acc); }

.cat-panel[hidden] { display: none; }

.api-item {
  display: block;
  padding: .95rem 1.1rem;
  border: var(--panel-border);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--panel-shadow);
  text-decoration: none;
  color: inherit;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}
.api-item + .api-item { margin-top: .6rem; }
.api-item:hover {
  border-color: var(--acc-line);
  box-shadow: var(--panel-shadow-h);
  text-decoration: none;
  transform: translateY(-1px);
}
.api-item h3 {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.01em;
}
.api-item .path {
  display: inline-block;
  margin-top: .5rem;
  font: 400 12.5px/1.5 var(--mono);
  color: var(--ink-3);
}
.api-item .desc { margin: .35rem 0 0; font-size: 13.5px; color: var(--ink-3); }

@media (max-width: 760px) {
  .catalog { grid-template-columns: 1fr; gap: 1rem; }
  .cat-list { position: static; flex-direction: row; overflow-x: auto; gap: .4rem; }
  .cat-list button { width: auto; white-space: nowrap; }
  .cat-list button .n { display: none; }
}

/* ---------- 表单 ---------- */

.auth-page { position: relative; min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 3rem var(--pad); overflow: hidden; }
.card {
  position: relative; width: 100%; max-width: 384px;
  border: var(--panel-border); border-radius: var(--radius-lg);
  background: var(--bg); padding: clamp(1.6rem, 4vw, 2.1rem);
  box-shadow: var(--card-shadow);
}
.card h1 { font-size: 1.34rem; margin-bottom: .4rem; letter-spacing: -.02em; }
.card > p.sub { margin: 0 0 1.6rem; color: var(--ink-3); font-size: 14px; }

.field { margin-bottom: 1rem; }
.field label { display: block; margin-bottom: .35rem; font-size: 13.5px; color: var(--ink-2); }
.field input {
  width: 100%; height: 40px; padding: 0 .75rem;
  border: 1px solid var(--line-2); border-radius: var(--radius);
  background: var(--bg); color: var(--ink);
  font: 400 14.5px/1 var(--sans);
  transition: border-color .15s, box-shadow .15s;
}
.field input::placeholder { color: var(--ink-4); }
.field input:focus { outline: none; border-color: var(--acc); box-shadow: 0 0 0 3px var(--acc-ring); }
.field .hint { margin: .35rem 0 0; font-size: 12.5px; color: var(--ink-3); }

/* 输入框 + 右侧按钮（发送验证码） */
.field-row { display: flex; gap: .5rem; }
.field-row input { flex: 1; min-width: 0; }
.field-row .btn {
  flex: none;
  height: 40px;
  padding: 0 .85rem;
  font-size: 13.5px;
  color: var(--acc-2);
  border-color: var(--acc-line);
  background: var(--acc-dim);
}
.field-row .btn:hover:not(:disabled) { border-color: var(--acc); background: var(--acc-dim); }
.field-row .btn:disabled {
  color: var(--ink-4);
  border-color: var(--line-2);
  background: var(--bar-bg);
  cursor: not-allowed;
}

.form-foot { margin-top: 1.4rem; padding-top: 1.1rem; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--ink-3); text-align: center; }

.msg { display: none; margin-bottom: 1rem; padding: .55rem .75rem; border-radius: var(--radius); font-size: 13.5px; line-height: 1.5; }
.msg.show { display: block; }
.msg.err { border: 1px solid color-mix(in srgb, var(--down) 40%, #fff); background: color-mix(in srgb, var(--down) 7%, #fff); color: var(--down); }
.msg.ok  { border: 1px solid color-mix(in srgb, var(--up) 40%, #fff);   background: color-mix(in srgb, var(--up) 7%, #fff);   color: var(--up); }

.keybox { display: flex; align-items: center; gap: .75rem; padding: .8rem .95rem; border: 1px solid var(--acc-line); border-radius: var(--radius); background: var(--acc-dim); }
.keybox code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; font-size: 13.5px; color: var(--acc-2); font-weight: 500; }

/* ---------- 页脚 ---------- */

footer { border-top: 1px solid var(--line); margin-top: clamp(2.5rem, 6vw, 4rem); padding: 1.75rem 0; }
footer .wrap { display: flex; flex-wrap: wrap; gap: .75rem 1.75rem; align-items: center; justify-content: space-between; }
footer .tag { color: var(--ink-4); font-size: 12.5px; }
footer nav { display: flex; gap: 1.25rem; }
footer nav a { font-size: 13.5px; color: var(--ink-3); text-decoration: none; }
footer nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

.tag { font: 500 12px/1 var(--mono); color: var(--ink-3); }
.sig { color: var(--acc-2); font-weight: 500; background: var(--acc-dim); padding: .1em .35em; border-radius: 3px; }
.rise { animation: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

@media (max-width: 760px) {
  .top .wrap { grid-template-columns: auto 1fr; gap: .9rem; height: auto; padding-block: .7rem; row-gap: .5rem; }
  .brand { grid-column: 1; }
  .top-right { grid-column: 2; }
  .nav { grid-column: 1 / -1; gap: 1.4rem; }
  .nav a { font-size: 15px; }
}