/* Softwhisper — 静谧 EV 仪表盘 / calm-dashboard 风
   独立视觉身份:通透浅底 + 青绿/薄荷 + 大圆角药丸 chip + 左侧粘性目录栏 (区别于其余三站的暗色/路牌/皮革) */
:root {
  --bg: #f5faf8;
  --card: #ffffff;
  --ink: #16292a;
  --soft: #546c69;
  --faint: #8aa19d;
  --line: #dce9e5;
  --teal: #139486;
  --teal-deep: #0c736a;
  --mint: #dcf1ec;
  --lime: #7fc06a;
  --amber: #e6a23c;
  --sans: "Nunito Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --num: "Nunito", "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.75; font-size: 17px; }
a { color: var(--teal-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--num); font-weight: 800; line-height: 1.2; margin: 0; letter-spacing: -.01em; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 5; background: rgba(245,250,248,.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.toprow { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.bolt { width: 22px; height: 22px; background: linear-gradient(140deg, var(--teal), var(--lime)); clip-path: polygon(58% 0, 22% 56%, 46% 56%, 40% 100%, 80% 40%, 54% 40%); }
.brand-text { font-family: var(--num); font-weight: 800; font-size: 21px; }
.brand-sub { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }
.nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--soft); font-size: 13.5px; padding: 7px 12px; border-radius: 20px; }
.nav a:hover { color: var(--teal-deep); background: var(--mint); text-decoration: none; }
.nav a.on { color: #fff; background: var(--teal); }

/* hero */
.hero { padding: 56px 0 30px; }
.eyebrow { font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--teal); margin: 0 0 10px; font-weight: 700; }
.hero h1 { font-size: clamp(32px, 5.4vw, 52px); }
.lede { color: var(--soft); font-size: 18.5px; max-width: 660px; margin: 14px 0 28px; }
.tiles { display: flex; gap: 14px; flex-wrap: wrap; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 16px 24px; min-width: 130px; box-shadow: 0 8px 24px rgba(19,148,134,.06); }
.tile-n { display: block; font-family: var(--num); font-size: 32px; color: var(--teal-deep); }
.tile-l { font-size: 12px; letter-spacing: .07em; text-transform: uppercase; color: var(--faint); }

/* lanes */
.lane { padding: 40px 22px; }
.lane.alt { border-top: 1px solid var(--line); }
.lane-title { font-size: 25px; }
.lane-intro { color: var(--soft); max-width: 720px; margin: 8px 0 12px; }
.lane-link { font-size: 13.5px; font-weight: 700; color: var(--teal); }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(288px, 1fr)); gap: 18px; margin-top: 20px; }
.card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; box-shadow: 0 10px 30px rgba(19,148,134,.05); transition: transform .16s ease, box-shadow .16s ease; }
.card:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(19,148,134,.13); text-decoration: none; }
.card-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.chip { font-size: 11px; letter-spacing: .04em; text-transform: uppercase; font-weight: 700; padding: 3px 10px; border-radius: 20px; background: var(--mint); color: var(--teal-deep); }
.chip.area { background: #eef4e9; color: #4f7a3e; }
.card-title { font-family: var(--num); font-size: 19px; font-weight: 800; color: var(--ink); }
.card-desc { color: var(--soft); font-size: 14.5px; margin: 8px 0 14px; flex: 1; }
.card-more { font-size: 12.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--teal); }

/* pill list */
.pilllist { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 14px 0 0; }
.pilllist a { font-size: 13.5px; color: var(--ink); background: var(--card); border: 1px solid var(--line); padding: 7px 14px; border-radius: 20px; display: inline-block; }
.pilllist a:hover { border-color: var(--teal); color: var(--teal-deep); text-decoration: none; }

/* chapter hero */
.chapter-hero { padding: 50px 22px 18px; }
.chapter-hero h1 { font-size: clamp(30px, 4.6vw, 44px); }
.count { font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); margin-top: 18px; }

/* article */
.article { padding: 30px 22px 60px; }
.crumbs { font-size: 13px; color: var(--faint); display: flex; gap: 9px; margin-bottom: 18px; }
.crumbs a { color: var(--soft); }
.art-head { padding-bottom: 20px; }
.kicker { display: inline-block; background: var(--mint); color: var(--teal-deep); font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 13px; border-radius: 20px; }
.art-head h1 { font-size: clamp(29px, 4.6vw, 44px); margin: 14px 0 6px; }
.art-sub { color: var(--soft); font-size: 15px; margin: 0 0 8px; }
.art-date { color: var(--faint); font-size: 12.5px; margin: 0; }

.art-layout { display: grid; grid-template-columns: 232px 1fr; gap: 40px; align-items: start; }
.toc { position: sticky; top: 82px; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.toc-title { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--teal); font-weight: 800; margin: 0 0 12px; }
.toc-list { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc-list li { counter-increment: toc; margin: 0 0 9px; }
.toc-list li::before { content: counter(toc, decimal-leading-zero); font-family: var(--num); font-size: 11px; color: var(--faint); margin-right: 8px; }
.toc-list a { color: var(--soft); font-size: 13.5px; }
.toc-list a:hover { color: var(--teal-deep); }

.art-body { min-width: 0; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.pill { display: inline-flex; align-items: baseline; gap: 7px; background: var(--mint); border-radius: 20px; padding: 7px 15px; }
.pill-k { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--teal-deep); font-weight: 800; }
.pill-v { color: var(--ink); font-size: 14px; }

.sec { margin-bottom: 32px; scroll-margin-top: 84px; }
.sec h2 { display: flex; align-items: baseline; gap: 12px; font-size: 22px; }
.sec-n { font-family: var(--num); font-size: 13px; color: #fff; background: var(--teal); border-radius: 20px; padding: 2px 10px; }
.sec-body p { color: #33494a; margin: 12px 0; }

.related { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }
.related h2 { font-size: 22px; margin-bottom: 12px; }
.linklist { list-style: none; margin: 0; padding: 0; }
.linklist li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.linklist a { color: var(--ink); font-weight: 600; }
.linklist a:hover { color: var(--teal-deep); }
.rel-cat { color: var(--faint); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }

/* legal */
.legal { padding: 46px 22px 60px; max-width: 820px; }
.legal h1 { font-size: clamp(28px, 4.2vw, 40px); margin: 14px 0 20px; }
.prose p { color: var(--soft); margin: 12px 0; }

/* footer */
.foot { border-top: 1px solid var(--line); margin-top: 40px; background: #eef6f3; }
.foot-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding-top: 32px; padding-bottom: 8px; }
.foot-brand { font-family: var(--num); font-weight: 800; font-size: 21px; margin: 0 0 6px; color: var(--teal-deep); }
.foot-tag { margin: 0; max-width: 440px; font-size: 14px; color: var(--soft); }
.foot nav { display: flex; gap: 16px; flex-wrap: wrap; }
.foot nav a { color: var(--soft); font-size: 14px; }
.foot nav a:hover { color: var(--teal-deep); }
.foot-note { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 18px 22px 26px; color: var(--faint); font-size: 12.5px; }

@media (max-width: 820px) {
  .art-layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .brand-sub { display: none; }
}