/* 官网样式。浅色与系统（src/ui/styles.css）同一套颜色；深色由同一个深青主色推出来。 */

:root {
  color-scheme: light;
  --bg: #F5F5F2; --surface: #FFFFFF; --ink: #1B1F24; --ink-2: #4A5059; --muted: #5E646D;
  --line: #E3E3DE; --line-2: #D6D6D0; --accent: #0F5D5E; --accent-ink: #0B4F50; --on-accent: #FFFFFF;
  --accent-soft: #E6F0EF; --band: #0B4F50; --band-ink: #F3F6F5; --band-sub: #C9D9D7; --band-line: #4E7A79;
  --shadow: rgba(11, 79, 80, .30); --head-bg: rgba(245, 245, 242, .9);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0D1214; --surface: #141B1E; --ink: #ECEFEC; --ink-2: #B7C0C2; --muted: #929C9F;
    --line: #253033; --line-2: #3A4649; --accent: #6CC2B4; --accent-ink: #6CC2B4; --on-accent: #082B2A;
    --accent-soft: #15302E; --band: #0F4546; --band-ink: #F3F6F5; --band-sub: #B9CFCC; --band-line: #4E7A79;
    --shadow: rgba(0, 0, 0, .6); --head-bg: rgba(13, 18, 20, .9);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0D1214; --surface: #141B1E; --ink: #ECEFEC; --ink-2: #B7C0C2; --muted: #929C9F;
  --line: #253033; --line-2: #3A4649; --accent: #6CC2B4; --accent-ink: #6CC2B4; --on-accent: #082B2A;
  --accent-soft: #15302E; --band: #0F4546; --band-ink: #F3F6F5; --band-sub: #B9CFCC; --band-line: #4E7A79;
  --shadow: rgba(0, 0, 0, .6); --head-bg: rgba(13, 18, 20, .9);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.75 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-ink); }
h1, h2, h3 { line-height: 1.3; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.serif { font-family: var(--serif); font-weight: 700; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 50; background: var(--surface); color: var(--ink); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- 顶栏 ---------- */
.head { position: sticky; top: 0; z-index: 20; background: var(--head-bg); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.head .wrap { display: flex; align-items: center; gap: 12px 28px; min-height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 17px; white-space: nowrap; }
.logo .mark { width: 32px; height: 32px; border-radius: 8px; background: var(--accent); color: var(--on-accent); display: grid; place-items: center; flex: none; }
.menu-btn { display: none; }
.menu { display: flex; align-items: center; gap: 12px 28px; flex: 1; }
.nav { display: flex; gap: 4px 22px; flex: 1; }
.nav a { text-decoration: none; color: var(--ink-2); font-size: 15px; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 600; border-bottom-color: var(--accent); }
.tools { display: flex; align-items: center; gap: 10px; }
.langs { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.langs a { min-width: 44px; height: 32px; border-radius: 999px; display: grid; place-items: center; text-decoration: none; font-size: 13px; color: var(--ink-2); }
.langs a[aria-current="true"] { background: var(--accent); color: var(--on-accent); }
.theme { width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; display: grid; place-items: center; }
.theme .sun { display: none; }
:root[data-theme="dark"] .theme .sun { display: block; }
:root[data-theme="dark"] .theme .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme .sun { display: block; }
  :root:not([data-theme="light"]) .theme .moon { display: none; }
}

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 50px; padding: 0 24px; border-radius: 8px; font-weight: 600; text-decoration: none; white-space: nowrap; border: 1px solid transparent; }
.btn.sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn.pri { background: var(--accent); color: var(--on-accent); }
.btn.pri:hover { filter: brightness(1.08); }
.btn.ghost { border-color: var(--line-2); color: var(--ink); }
.btn.ghost:hover { background: var(--surface); }
.btn.light { background: var(--band-ink); color: var(--band); }
.btn.outline-light { border-color: var(--band-line); color: var(--band-ink); }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 版块 ---------- */
.kicker { font-size: 13px; letter-spacing: .32em; color: var(--accent-ink); font-weight: 600; }
.hero { padding: 88px 0 40px; }
.hero h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(38px, 6vw, 64px); line-height: 1.18; margin: 22px 0; }
.hero h1 span { display: block; }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--ink-2); margin: 0; max-width: 640px; }
.note { margin-top: 18px; font-size: 14px; color: var(--muted); }
.page-head { padding: 80px 0 30px; }
.page-head h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(32px, 5vw, 54px); line-height: 1.2; margin: 18px 0; max-width: 820px; }
.sec { padding: 90px 0 30px; }
.sec h2 { font-family: var(--serif); font-weight: 700; font-size: clamp(27px, 3.4vw, 40px); margin: 0 0 14px; max-width: 780px; }
.sec .intro { margin: 0 0 40px; color: var(--ink-2); max-width: 680px; }
.shot { margin: 0; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); padding: 8px; box-shadow: 0 26px 56px -30px var(--shadow); }
.shot img { border-radius: 8px; }
.hero-shot { padding-top: 24px; }

.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(var(--min, 240px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 28px 26px; }
.card h3 { font-size: 19px; margin: 18px 0 8px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.badge-no { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; font-family: var(--serif); font-weight: 700; font-size: 18px; }

.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); border-top: 2px solid var(--accent); }
.flow li { padding: 22px 22px 8px 0; }
.flow .n { font-size: 13px; letter-spacing: .14em; color: var(--accent-ink); font-weight: 600; }
.flow .t { font-size: 20px; font-weight: 700; margin: 6px 0; }
.flow .d { font-size: 15px; color: var(--ink-2); }
.callout { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 6px 12px; padding: 18px 22px; border-radius: 14px; background: var(--accent-soft); }
.callout b { color: var(--accent-ink); }
.callout span { color: var(--ink-2); }

.spots { display: flex; flex-direction: column; gap: 96px; }
.spot { display: flex; flex-wrap: wrap; align-items: center; gap: 48px; }
.spot:nth-child(even) { flex-direction: row-reverse; }
.spot .txt { flex: 1 1 340px; min-width: 0; }
.spot .shot { flex: 1.5 1 480px; min-width: 0; }
.spot h3 { font-family: var(--serif); font-size: clamp(25px, 3vw, 34px); margin: 12px 0 14px; }
.spot p { margin: 0 0 18px; color: var(--ink-2); }
.ticks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ticks li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.ticks svg { flex: none; margin-top: 4px; color: var(--accent-ink); }

.trust { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--surface); }
.trust > div { padding: 30px 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 0 -1px -1px 0; }
.trust b { display: block; font-size: 18px; margin-bottom: 8px; }
.trust span { font-size: 15px; color: var(--ink-2); }
.more-link { display: inline-block; margin-top: 16px; font-weight: 600; text-decoration: none; }

.band-sec { padding: 60px 0 100px; }
.band { border-radius: 14px; background: var(--band); color: var(--band-ink); padding: clamp(32px, 6vw, 72px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.band h2 { font-family: var(--serif); font-size: clamp(26px, 3.6vw, 42px); margin: 0 0 10px; }
.band p { margin: 0; color: var(--band-sub); }
.band > div:first-child { max-width: 620px; }

.mods { --min: 260px; gap: 16px; }
.mod { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; }
.mod .h { display: flex; align-items: baseline; gap: 12px; }
.mod .no { font-family: var(--serif); font-weight: 700; color: var(--accent-ink); font-size: 15px; min-width: 24px; }
.mod h3 { margin: 0; font-size: 18px; }
.mod p { margin: 8px 0 0; color: var(--ink-2); font-size: 15px; }
.gallery { --min: 420px; gap: 28px; }
.gallery figcaption { margin-top: 14px; }
.gallery figcaption b { display: block; font-size: 17px; }
.gallery figcaption span { color: var(--ink-2); font-size: 15px; }

.split { display: flex; flex-wrap: wrap; gap: 40px; }
.split > :first-child { flex: 1 1 300px; min-width: 0; }
.split > :last-child { flex: 2 1 560px; min-width: 0; }
.tbox { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th { text-align: left; padding: 14px 18px; background: var(--accent); color: var(--on-accent); white-space: nowrap; }
td { padding: 14px 18px; border-top: 1px solid var(--line); vertical-align: top; color: var(--ink-2); }
td:first-child { font-weight: 600; color: var(--ink); }

.blocks { --min: 320px; }
.blocks .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; }
.blocks h2 { font-size: 21px; margin: 20px 0 14px; }
.blocks .ticks li { color: var(--ink-2); }

.steps { --min: 240px; list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; flex-direction: column; gap: 10px; }
.steps .big { font-family: var(--serif); font-weight: 700; font-size: 40px; line-height: 1; color: var(--accent-ink); }
.steps h2 { font-size: 19px; margin: 8px 0 0; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 0; min-height: 44px; font-weight: 600; font-size: 17px; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-ink); font-size: 24px; line-height: 1; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq p { margin: 0 0 22px; color: var(--ink-2); }
.contact dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 12px 18px; font-size: 15px; }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; font-weight: 600; }

/* ---------- 页脚 ---------- */
.foot { border-top: 1px solid var(--line); }
.foot .wrap { padding-top: 40px; padding-bottom: 48px; display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; font-size: 14px; color: var(--muted); }
.foot b { display: block; color: var(--ink); font-size: 16px; margin-bottom: 6px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 10px 28px; }
.foot nav a { color: var(--ink-2); text-decoration: none; }
.foot .copy { flex-basis: 100%; }

/* ---------- 手机 ---------- */
@media (max-width: 900px) {
  .menu-btn { display: grid; place-items: center; margin-left: auto; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; }
  .head .wrap { flex-wrap: wrap; min-height: 60px; }
  .menu { display: none; flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 14px; padding: 4px 0 18px; }
  .head.open .menu { display: flex; }
  .nav { flex-direction: column; gap: 0; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav a[aria-current="page"] { border-bottom-color: var(--line); color: var(--accent-ink); }
  .tools { flex-wrap: wrap; }
  .tools .btn { flex: 1; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 48px 0 24px; }
  .page-head { padding: 48px 0 16px; }
  .sec { padding: 64px 0 20px; }
  .sec .intro { margin-bottom: 28px; }
  .spots { gap: 64px; }
  .spot, .spot:nth-child(even) { flex-direction: column; align-items: stretch; gap: 24px; }
  .spot .txt, .spot .shot { flex: none; }
  .gallery { --min: 100%; }
  .card { padding: 22px 20px; }
  .btns .btn { flex: 1 1 100%; }
  .band .btn { flex: 1 1 100%; }
  .band-sec { padding: 40px 0 64px; }
  td, th { padding: 12px 14px; }
  td:first-child { white-space: normal; min-width: 6em; }
}
@media (min-width: 601px) { table.roles { min-width: 520px; } }