/* 山海灵境 - 全站样式 */
:root {
  --ink: #22313d;
  --muted: #64748b;
  --primary: #17557d;
  --primary-d: #0e3f5e;
  --primary-l: #e8f1f7;
  --accent: #d97a34;
  --accent-l: #fdf1e7;
  --bg: #f5f7f9;
  --card: #ffffff;
  --line: #e4eaf0;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(23, 85, 125, .05), 0 10px 30px rgba(23, 85, 125, .07);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.ic { flex: none; vertical-align: -2px; }

/* ---------- 顶栏合规链接 ---------- */
.topline { background: var(--primary-d); color: rgba(255, 255, 255, .82); font-size: 12px; }
.topline__in { display: flex; justify-content: flex-end; align-items: center; gap: 10px; height: 30px; }
.topline__in a { white-space: nowrap; transition: color .2s; }
.topline__in a:hover { color: #fff; }
.topline__in i { color: rgba(255, 255, 255, .35); font-style: normal; }

/* ---------- 页头 ---------- */
.site-header { position: sticky; top: 0; z-index: 60; background: rgba(255, 255, 255, .94); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header__main { display: flex; align-items: center; gap: 18px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand__logo { width: 168px; height: 48px; }
.brand__name { font-size: 13px; font-weight: 600; color: var(--primary-d); letter-spacing: .02em; line-height: 1.35; border-left: 1px solid var(--line); padding-left: 12px; max-width: 220px; }
.hd-nav { flex: 1; display: flex; justify-content: center; gap: 6px; min-width: 0; }
.hd-nav__a { padding: 8px 16px; border-radius: 999px; font-size: 15px; color: var(--ink); transition: .2s; white-space: nowrap; }
.hd-nav__a:hover { background: var(--primary-l); color: var(--primary-d); }
.hd-nav__a.is-on { background: var(--primary); color: #fff; font-weight: 500; }
.hd-right { flex: none; display: flex; align-items: center; gap: 16px; }
.hd-corp { text-align: right; line-height: 1.3; }
.hd-corp .lbl { display: block; font-size: 10px; color: var(--muted); letter-spacing: .18em; }
.hd-corp .nm { display: block; font-size: 12.5px; font-weight: 600; color: var(--primary-d); }
.hd-acc { display: flex; align-items: center; gap: 10px; }
.hd-link { display: inline-flex; align-items: center; gap: 5px; font-size: 13.5px; padding: 6px 12px; border-radius: 8px; border: 1px solid var(--line); background: #fff; color: var(--ink); transition: .2s; white-space: nowrap; }
.hd-link:hover { border-color: var(--primary); color: var(--primary); }
.hd-link--accent { background: var(--primary); border-color: var(--primary); color: #fff; }
.hd-link--accent:hover { background: var(--primary-d); color: #fff; }
.hd-link--btn { background: #fff; }
.burger { display: none; background: none; border: 0; color: var(--ink); padding: 6px; }
.hd-drawer { display: none; border-top: 1px solid var(--line); background: #fff; }
.hd-drawer.is-open { display: block; }
.hd-drawer__in { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px 12px; padding: 12px 24px 16px; }
.hd-drawer__in a { padding: 9px 4px; font-size: 14px; border-bottom: 1px dashed var(--line); }

/* ---------- 首页 hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(160deg, #0e3f5e 0%, #17557d 55%, #1d6b8f 100%); color: #fff; }
.hero::after { content: ""; position: absolute; right: -120px; top: -120px; width: 480px; height: 480px; border-radius: 50%; background: radial-gradient(circle, rgba(217, 122, 52, .28), transparent 65%); }
.hero__in { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; padding: 76px 24px 84px; }
.hero__eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: .22em; color: #ffd9b8; border: 1px solid rgba(255, 217, 184, .4); padding: 6px 14px; border-radius: 999px; margin-bottom: 22px; }
.hero h1 { font-size: 40px; line-height: 1.28; font-weight: 700; letter-spacing: .01em; }
.hero h1 em { font-style: normal; color: #ffc591; }
.hero__sub { margin: 18px 0 30px; font-size: 16px; color: rgba(255, 255, 255, .85); max-width: 560px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 999px; font-size: 15px; border: 1px solid transparent; transition: .2s; }
.btn--main { background: var(--accent); color: #fff; font-weight: 600; box-shadow: 0 8px 22px rgba(217, 122, 52, .35); }
.btn--main:hover { background: #c56a28; transform: translateY(-1px); }
.btn--ghost { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); }
.btn--line { border-color: var(--primary); color: var(--primary); background: #fff; }
.btn--line:hover { background: var(--primary-l); }
.hero__art { display: flex; justify-content: center; }
.hero__art svg { width: 100%; max-width: 380px; height: auto; filter: drop-shadow(0 18px 40px rgba(0, 0, 0, .3)); }

/* ---------- 数据条 ---------- */
.stats { background: #fff; border-bottom: 1px solid var(--line); }
.stats__in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; padding: 30px 24px; }
.stat { text-align: center; }
.stat b { display: block; font-size: 30px; color: var(--primary); font-weight: 700; letter-spacing: .02em; }
.stat span { font-size: 13px; color: var(--muted); }
.stat + .stat { border-left: 1px solid var(--line); }

/* ---------- 区块 ---------- */
.section { padding: 64px 0 8px; }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 30px; }
.section__head h2 { font-size: 26px; font-weight: 700; color: var(--primary-d); display: flex; align-items: center; gap: 12px; }
.section__head h2::before { content: ""; width: 6px; height: 24px; border-radius: 3px; background: linear-gradient(180deg, var(--primary), var(--accent)); }
.section__head p { font-size: 14px; color: var(--muted); margin-top: 6px; }
.section__more { font-size: 14px; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
.section__more:hover { color: var(--accent); }

/* ---------- 作品卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.card { background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-5px); box-shadow: 0 2px 4px rgba(23, 85, 125, .06), 0 18px 42px rgba(23, 85, 125, .14); }
.card__cover { position: relative; aspect-ratio: 3 / 4; overflow: hidden; background: var(--primary-l); }
.card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.card:hover .card__cover img { transform: scale(1.04); }
.card__cat { position: absolute; left: 12px; top: 12px; background: rgba(14, 63, 94, .88); color: #fff; font-size: 12px; padding: 3px 10px; border-radius: 999px; backdrop-filter: blur(4px); }
.card__body { padding: 18px 20px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card__title { font-size: 18px; font-weight: 700; color: var(--ink); }
.card__intro { font-size: 13.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 46px; }
.card__meta { display: flex; align-items: center; gap: 14px; font-size: 12.5px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 12px; margin-top: auto; }
.card__meta .ic { color: var(--primary); }
.card__star { margin-left: auto; color: #c4cfd8; }
.card__star.is-on { color: var(--accent); }
.card__star.is-on .ic { fill: var(--accent); }

/* ---------- 分类 ---------- */
.cats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; display: flex; gap: 16px; align-items: flex-start; transition: .25s; box-shadow: var(--shadow); }
.cat:hover { border-color: var(--primary); transform: translateY(-3px); }
.cat__ic { flex: none; width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: var(--primary-l); color: var(--primary); }
.cat:nth-child(2) .cat__ic { background: var(--accent-l); color: var(--accent); }
.cat h3 { font-size: 17px; color: var(--primary-d); }
.cat p { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------- 关于 / CTA ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.about-grid h2 { font-size: 26px; color: var(--primary-d); margin-bottom: 16px; }
.about-grid p { color: #40525f; margin-bottom: 14px; text-align: justify; }
.about-grid .btn { margin-top: 8px; }
.about-art { background: linear-gradient(150deg, var(--primary-l), #fff); border: 1px solid var(--line); border-radius: 18px; padding: 30px; }
.about-art svg { width: 100%; height: auto; }
.cta { margin: 64px 0 72px; background: linear-gradient(120deg, var(--primary-d), var(--primary)); border-radius: 20px; color: #fff; padding: 46px 48px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; position: relative; overflow: hidden; }
.cta::after { content: ""; position: absolute; right: -60px; bottom: -90px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(217, 122, 52, .35), transparent 65%); }
.cta h2 { font-size: 24px; position: relative; z-index: 1; }
.cta p { color: rgba(255, 255, 255, .82); font-size: 14px; margin-top: 8px; max-width: 620px; position: relative; z-index: 1; }
.cta .btn { position: relative; z-index: 1; }

/* ---------- 子页页头 ---------- */
.pagehead { background: linear-gradient(150deg, var(--primary-d), var(--primary)); color: #fff; padding: 44px 0 40px; }
.pagehead .crumb { font-size: 12.5px; color: rgba(255, 255, 255, .72); margin-bottom: 12px; }
.pagehead .crumb a:hover { color: #ffc591; }
.pagehead h1 { font-size: 28px; font-weight: 700; }
.pagehead p { font-size: 14px; color: rgba(255, 255, 255, .82); margin-top: 8px; }
.body { padding: 40px 0 64px; min-height: 52vh; }

/* ---------- 筛选 ---------- */
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }
.chip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 7px 18px; font-size: 13.5px; color: var(--muted); transition: .2s; }
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.is-on { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- 详情页 ---------- */
.detail { display: grid; grid-template-columns: 340px 1fr; gap: 40px; align-items: start; }
.detail__cover { border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); background: #fff; }
.detail__cover img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.detail__side { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 22px 24px; margin-top: 20px; box-shadow: var(--shadow); }
.detail__side h3 { font-size: 15px; color: var(--primary-d); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.side__row { display: flex; justify-content: space-between; gap: 14px; font-size: 13.5px; padding: 8px 0; border-bottom: 1px dashed var(--line); }
.side__row:last-child { border-bottom: 0; }
.side__row .k { color: var(--muted); flex: none; }
.side__row .v { text-align: right; overflow-wrap: anywhere; }
.detail__info h1 { font-size: 26px; color: var(--primary-d); font-weight: 700; }
.detail__meta { display: flex; flex-wrap: wrap; gap: 10px 22px; font-size: 13.5px; color: var(--muted); margin: 14px 0 18px; }
.detail__meta .ic { color: var(--primary); }
.detail__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.tag { background: var(--primary-l); color: var(--primary-d); font-size: 12.5px; padding: 4px 12px; border-radius: 999px; }
.detail__desc p { color: #40525f; margin-bottom: 14px; text-align: justify; }
.detail__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.fav-btn.is-on { background: var(--accent-l); border-color: var(--accent); color: var(--accent); }
.fav-btn.is-on .ic { fill: var(--accent); }
.detail__empty { text-align: center; padding: 80px 0; color: var(--muted); }

/* ---------- 阅读器 ---------- */
body.reader { background: #10181f; }
.reader__bar { display: flex; align-items: center; gap: 14px; padding: 10px 20px; background: #16222c; border-bottom: 1px solid rgba(255, 255, 255, .1); color: rgba(255, 255, 255, .9); }
.reader__bar a { color: rgba(255, 255, 255, .85); font-size: 13.5px; display: inline-flex; align-items: center; gap: 5px; }
.reader__bar a:hover { color: #fff; }
.reader__title { font-size: 14.5px; font-weight: 600; }
.reader__spacer { flex: 1; }
.reader__pagewrap { display: flex; flex-direction: column; align-items: center; padding: 26px 16px 60px; }
.reader__page { width: 100%; max-width: 700px; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); }
.reader__page img { width: 100%; height: auto; }
.reader__ctrl { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 22px; flex-wrap: wrap; }
.rbtn { display: inline-flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, .1); color: #fff; border: 1px solid rgba(255, 255, 255, .22); border-radius: 999px; padding: 9px 20px; font-size: 14px; transition: .2s; }
.rbtn:hover:not(:disabled) { background: rgba(255, 255, 255, .2); }
.rbtn:disabled { opacity: .35; cursor: not-allowed; }
.reader__jump { display: inline-flex; align-items: center; gap: 8px; color: rgba(255, 255, 255, .75); font-size: 13px; }
.reader__jump input { width: 58px; text-align: center; border-radius: 8px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .1); color: #fff; padding: 8px 6px; font-size: 14px; }
.reader__bar-progress { height: 3px; background: rgba(255, 255, 255, .12); }
.reader__bar-progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), #ffb46b); transition: width .3s; }

/* ---------- 表单 ---------- */
.form-wrap { max-width: 460px; margin: 12px auto; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 38px 40px 34px; }
.form-wrap h1 { font-size: 22px; color: var(--primary-d); text-align: center; }
.form-wrap .lead { text-align: center; font-size: 13.5px; color: var(--muted); margin: 8px 0 26px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; color: var(--ink); margin-bottom: 7px; font-weight: 500; }
.field input[type="text"], .field input[type="password"] { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px; font-size: 14.5px; font-family: inherit; transition: .2s; background: #fbfcfd; }
.field input:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px var(--primary-l); }
.field .tip { font-size: 12px; color: var(--muted); margin-top: 6px; }
.form-msg { font-size: 13px; border-radius: 8px; padding: 9px 12px; margin-bottom: 14px; display: none; }
.form-msg.is-on { display: block; }
.form-msg--err { background: #fdecea; color: #b3261e; }
.form-msg--ok { background: #e6f4ea; color: #1e7e34; }
.check { display: flex; align-items: flex-start; gap: 9px; font-size: 13px; color: #40525f; margin: 10px 0; cursor: pointer; user-select: none; }
.check input { margin-top: 3px; width: 16px; height: 16px; flex: none; accent-color: var(--primary); }
.check a { color: var(--primary); }
.check a:hover { text-decoration: underline; }
.form-wrap .btn { width: 100%; justify-content: center; margin-top: 8px; }
.form-wrap .btn:disabled { opacity: .55; cursor: not-allowed; }
.form-alt { text-align: center; font-size: 13.5px; color: var(--muted); margin-top: 20px; }
.form-alt a { color: var(--primary); font-weight: 500; }

/* ---------- 个人中心 ---------- */
.account { display: grid; grid-template-columns: 240px 1fr; gap: 28px; align-items: start; }
.account__menu { background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.account__menu .who { padding: 20px; border-bottom: 1px solid var(--line); background: linear-gradient(150deg, var(--primary-l), #fff); }
.account__menu .who b { font-size: 16px; color: var(--primary-d); }
.account__menu .who span { display: block; font-size: 12px; color: var(--muted); margin-top: 3px; }
.account__menu a { display: flex; align-items: center; gap: 9px; padding: 13px 20px; font-size: 14px; color: var(--ink); border-bottom: 1px dashed var(--line); transition: .2s; }
.account__menu a:last-child { border-bottom: 0; }
.account__menu a:hover { background: var(--primary-l); color: var(--primary-d); }
.account__menu a.is-on { background: var(--primary); color: #fff; }
.account__menu a.is-on .ic { color: #fff; }
.account__main { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 28px 30px; min-height: 420px; }
.account__main h2 { font-size: 19px; color: var(--primary-d); margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.kv { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; }
.kv .kv__row { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; padding: 12px 2px; border-bottom: 1px dashed var(--line); }
.kv .kv__row span { color: var(--muted); }
.kv .kv__row b { font-weight: 600; overflow-wrap: anywhere; }
.mini-list { display: grid; gap: 14px; }
.mini { display: flex; gap: 14px; border: 1px solid var(--line); border-radius: 12px; padding: 12px; align-items: center; transition: .2s; }
.mini:hover { border-color: var(--primary); }
.mini img { width: 64px; height: 86px; object-fit: cover; border-radius: 8px; flex: none; background: var(--primary-l); }
.mini__body { flex: 1; min-width: 0; }
.mini__body b { font-size: 15px; color: var(--primary-d); }
.mini__body p { font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.mini__go { flex: none; font-size: 13px; color: var(--primary); display: inline-flex; align-items: center; gap: 3px; }
.empty { text-align: center; padding: 56px 20px; color: var(--muted); }
.empty .ic { color: #b8c4cd; margin-bottom: 10px; }
.empty p { font-size: 14px; margin-bottom: 16px; }

/* ---------- 文档页（协议 / 合规） ---------- */
.doc { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 42px 48px; max-width: 920px; margin: 0 auto; }
.doc h1 { font-size: 24px; color: var(--primary-d); text-align: center; margin-bottom: 6px; }
.doc .doc__meta { text-align: center; font-size: 12.5px; color: var(--muted); margin-bottom: 30px; }
.doc h2 { font-size: 17.5px; color: var(--primary-d); margin: 28px 0 12px; padding-left: 12px; border-left: 4px solid var(--primary); }
.doc h3 { font-size: 15.5px; color: var(--ink); margin: 18px 0 8px; }
.doc p { color: #40525f; margin-bottom: 10px; text-align: justify; }
.doc ul, .doc ol { margin: 6px 0 12px 22px; color: #40525f; }
.doc li { margin-bottom: 6px; }
.doc .note { background: var(--accent-l); border: 1px solid #f3d9bf; border-radius: 10px; padding: 14px 16px; font-size: 13.5px; color: #8a4d16; margin: 14px 0; }
.doc .note--blue { background: var(--primary-l); border-color: #c9dce8; color: var(--primary-d); }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0 18px; font-size: 13.5px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.doc th { background: var(--primary-l); color: var(--primary-d); font-weight: 600; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0e3f5e; color: rgba(255, 255, 255, .78); margin-top: 20px; }
.footer__top { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 36px; padding: 48px 0 34px; }
.footer__brand { display: flex; gap: 14px; align-items: flex-start; }
.footer__brand img { width: 150px; height: 43px; flex: none; background: rgba(255, 255, 255, .94); border-radius: 10px; padding: 6px 10px; }
.footer__brand strong { display: block; font-size: 14.5px; color: #fff; line-height: 1.5; }
.footer__brand span { display: block; font-size: 12.5px; color: rgba(255, 255, 255, .6); margin-top: 6px; }
.footer__col h4 { font-size: 14px; color: #fff; margin-bottom: 14px; }
.footer__col a { display: block; font-size: 13px; padding: 5px 0; color: rgba(255, 255, 255, .72); }
.footer__col a:hover { color: #ffc591; }
.footer__row { border-top: 1px solid rgba(255, 255, 255, .12); padding: 13px 0; font-size: 12.5px; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; }
.footer__row a:hover { color: #ffc591; }
.footer__row i { color: rgba(255, 255, 255, .3); font-style: normal; }
.footer__row--links { justify-content: center; gap: 6px 8px; }
.footer__row--report { justify-content: center; }
.footer__row--legal { justify-content: center; gap: 6px 18px; }
.footer__row--legal .icp { color: #ffd9b8; }
.footer__row--contact { justify-content: center; gap: 6px 20px; color: rgba(255, 255, 255, .66); }
.footer__row--contact .ic { color: rgba(255, 255, 255, .55); }

/* ---------- toast / 返回顶部 ---------- */
.toast { position: fixed; left: 50%; bottom: 42px; transform: translateX(-50%) translateY(16px); background: rgba(14, 63, 94, .95); color: #fff; font-size: 14px; padding: 11px 22px; border-radius: 999px; opacity: 0; pointer-events: none; transition: .3s; z-index: 200; box-shadow: 0 10px 30px rgba(0, 0, 0, .25); }
.toast--on { opacity: 1; transform: translateX(-50%) translateY(0); }
.totop { position: fixed; right: 26px; bottom: 30px; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: #fff; color: var(--primary); box-shadow: var(--shadow); display: grid; place-items: center; opacity: 0; pointer-events: none; transform: translateY(8px); transition: .3s; z-index: 90; }
.totop--on { opacity: 1; pointer-events: auto; transform: translateY(0); }
.totop:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hd-corp { display: none; }
  .brand__name { max-width: 168px; }
  .hero__in { grid-template-columns: 1fr; gap: 30px; padding: 56px 24px 60px; }
  .hero__art { display: none; }
  .detail { grid-template-columns: minmax(0, 1fr); }
  .detail__cover { max-width: 340px; }
  .account { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 900px) {
  .topline { display: none; }
  .hd-nav { display: none; }
  .burger { display: block; margin-right: 2px; }
  .header__main { height: 60px; gap: 10px; }
  .brand__logo { width: 105px; height: 30px; }
  .brand__name { display: none; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .cats { grid-template-columns: 1fr; }
  .stats__in { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .stat:nth-child(3) { border-left: 0; }
  .section { padding: 44px 0 6px; }
  .doc { padding: 28px 22px; }
  .form-wrap { padding: 30px 24px 26px; }
  .kv { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  body { font-size: 14.5px; }
  .hero h1 { font-size: 30px; }
  .cards { grid-template-columns: 1fr; }
  .hd-acc .hd-link:not(.hd-link--accent) { display: none; }
  .hd-drawer__in { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr; gap: 24px; padding: 36px 0 26px; }
  .footer__row--contact { flex-direction: column; align-items: flex-start; text-align: left; gap: 8px; }
  .section__head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .account__main { padding: 20px 18px; }
  .cta { padding: 32px 26px; }
}