/* 怡水若寒 · 个人小程序作品站
   纯静态样式，无预处理器、无框架 */

:root {
  --ink:      #122028;
  --ink-2:    #4d6675;
  --ink-3:    #8b9ea9;
  --bg:       #f3f7f9;
  --card:     #ffffff;
  --line:     #e3edf2;
  --line-2:   #eef5f8;

  --brand:    #0e7490;
  --brand-2:  #14a2b8;
  --brand-bg: #e4f3f7;

  --energy:    #0f9b8e;
  --energy-bg: #e2f5f2;
  --price:     #c1741b;
  --price-bg:  #fbf0e2;

  --up:   #d62b2b;
  --down: #16884a;

  --r:   16px;
  --r-s: 10px;
  --sh:  0 1px 2px rgba(18, 32, 40, .04), 0 8px 24px -12px rgba(18, 32, 40, .12);
  --sh-h:0 1px 2px rgba(18, 32, 40, .05), 0 18px 40px -16px rgba(14, 116, 144, .28);

  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -.01em; line-height: 1.35; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 26px; }
.narrow    { max-width: 800px; }

/* ── 顶栏 ─────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar-in { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: .04em; }
.brand-sub  { font-size: 10px; letter-spacing: .22em; color: var(--ink-3); text-transform: uppercase; }

.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  position: relative; padding: 7px 14px; border-radius: 999px;
  font-size: 14.5px; color: var(--ink-2); transition: .18s;
}
.nav a:hover { color: var(--brand); background: var(--brand-bg); }
.nav a.on    { color: var(--brand); font-weight: 600; background: var(--brand-bg); }

.nav-toggle { display: none; margin-left: auto; }

/* ── Hero ─────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; padding: 82px 0 96px; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(820px 380px at 12% -8%, #dcf0f6 0%, rgba(220,240,246,0) 62%),
    radial-gradient(700px 320px at 88% 8%, #e6f4ee 0%, rgba(230,244,238,0) 60%),
    linear-gradient(180deg, #f9fcfd 0%, var(--bg) 100%);
}
.hero > .container { position: relative; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: .06em; color: var(--brand);
  background: rgba(255,255,255,.75); border: 1px solid var(--line);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero-eyebrow i { width: 5px; height: 5px; border-radius: 50%; background: var(--brand-2); }
.hero h1 { font-size: clamp(38px, 6.4vw, 62px); letter-spacing: .02em; }
.hero .lede { margin-top: 18px; max-width: 620px; font-size: 18px; color: var(--ink-2); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 40px; }
.hero-meta b { display: block; font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.hero-meta span { font-size: 13px; color: var(--ink-3); }

.hero-wave { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; height: 92px; }

/* ── 区块 ─────────────────────────────────────────── */
.section { padding: 62px 0; }
.section-head { margin-bottom: 30px; }
.section-kicker { font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); }
.section-head h2 { font-size: 26px; margin-top: 6px; }
.section-head p { margin-top: 8px; color: var(--ink-2); font-size: 15px; }

/* ── 作品卡 ───────────────────────────────────────── */
.app-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.app-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
  padding: 30px 30px 26px; overflow: hidden; transition: .22s ease;
}
.app-card:hover { transform: translateY(-4px); box-shadow: var(--sh-h); border-color: #d3e6ee; }
.app-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent, var(--brand));
}
.app-card.energy { --accent: var(--energy); --tint: var(--energy-bg); }
.app-card.price  { --accent: var(--price);  --tint: var(--price-bg); }

.app-top { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.app-ico {
  width: 46px; height: 46px; flex: none; border-radius: 12px;
  display: grid; place-items: center; background: var(--tint); color: var(--accent);
}
.app-ico svg { width: 24px; height: 24px; }
.app-title h3 { font-size: 20px; }
.app-title .ver { font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.app-tag { font-size: 15.5px; font-weight: 600; color: var(--ink); }
.app-desc { margin-top: 10px; font-size: 14.5px; color: var(--ink-2); }
.app-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip {
  font-size: 12.5px; padding: 4px 11px; border-radius: 999px;
  background: var(--line-2); color: var(--ink-2); border: 1px solid var(--line);
}
.app-more {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 22px;
  font-size: 14.5px; font-weight: 600; color: var(--accent);
}
.app-more svg { width: 15px; height: 15px; transition: transform .2s; }
.app-card:hover .app-more svg { transform: translateX(4px); }

/* ── 共同点 ───────────────────────────────────────── */
.shared-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.shared-item {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s);
  padding: 22px 24px;
}
.shared-item h4 { font-size: 15.5px; display: flex; align-items: center; gap: 9px; }
.shared-item h4::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-2); flex: none;
}
.shared-item p { margin-top: 8px; font-size: 14px; color: var(--ink-2); }

/* ── 详情页 ───────────────────────────────────────── */
.crumb { padding: 20px 0 0; font-size: 13px; color: var(--ink-3); }
.crumb a:hover { color: var(--brand); }

.dhead { position: relative; overflow: hidden; padding: 34px 0 52px; }
.dhead::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(760px 300px at 20% 0%, var(--tint) 0%, rgba(255,255,255,0) 68%),
              linear-gradient(180deg, #f9fcfd, var(--bg));
}
.dhead > .container { position: relative; }
.dhead.energy { --accent: var(--energy); --tint: var(--energy-bg); }
.dhead.price  { --accent: var(--price);  --tint: var(--price-bg); }

.dhead-top { display: flex; align-items: center; gap: 16px; }
.dhead-ico {
  width: 58px; height: 58px; border-radius: 15px; display: grid; place-items: center;
  background: var(--tint); color: var(--accent); border: 1px solid rgba(0,0,0,.04);
}
.dhead-ico svg { width: 30px; height: 30px; }
.dhead h1 { font-size: clamp(28px, 4.6vw, 40px); }
.dhead .appname { margin-top: 4px; font-size: 13.5px; color: var(--ink-3); }
.dhead .tagline { margin-top: 16px; font-size: 18px; font-weight: 600; }
.dhead .summary { margin-top: 10px; max-width: 660px; font-size: 15.5px; color: var(--ink-2); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 999px; font-size: 14.5px; font-weight: 600;
  border: 1px solid var(--line); background: #fff; color: var(--ink); transition: .18s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { color: #fff; filter: brightness(1.07); }
.btn svg { width: 15px; height: 15px; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: start; }
.main   { min-width: 0; }
.aside  { position: sticky; top: 86px; display: grid; gap: 18px; }

.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; }
.panel h3 { font-size: 15px; letter-spacing: .02em; }
.panel .rule { height: 1px; background: var(--line-2); margin: 14px 0; }

.facts { display: grid; gap: 12px; }
.fact { display: flex; justify-content: space-between; gap: 14px; font-size: 14px; }
.fact dt { color: var(--ink-3); flex: none; }
.fact dd { margin: 0; text-align: right; font-weight: 600; }

.qr { text-align: center; }
.qr img { width: 100%; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.qr p { margin-top: 12px; font-size: 13px; color: var(--ink-3); }

.block { margin-top: 46px; }
.block > h2 {
  font-size: 21px; display: flex; align-items: center; gap: 11px; padding-bottom: 14px;
  border-bottom: 1px solid var(--line); margin-bottom: 22px;
}
.block > h2 .idx {
  font-size: 12px; font-variant-numeric: tabular-nums; color: var(--accent);
  background: var(--tint); padding: 3px 9px; border-radius: 6px; font-weight: 700;
}
.block-intro { color: var(--ink-2); font-size: 15px; margin-bottom: 20px; }

.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.feature {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s);
  padding: 20px 22px; transition: .2s;
}
.feature:hover { border-color: #d3e6ee; box-shadow: var(--sh); }
.feature h4 { font-size: 15px; }
.feature p { margin-top: 7px; font-size: 14px; color: var(--ink-2); }

.pagelist { display: grid; gap: 10px; }
.pagelist li {
  display: flex; gap: 14px; align-items: baseline;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s);
  padding: 13px 18px; font-size: 14.5px;
}
.pagelist b { flex: none; min-width: 84px; font-weight: 650; }
.pagelist span { color: var(--ink-2); font-size: 14px; }

.table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.table th, .table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line-2); }
.table th { font-size: 13px; color: var(--ink-3); font-weight: 500; }
.table td:first-child { font-weight: 600; white-space: nowrap; }
.table td:last-child { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.table tr:last-child td { border-bottom: 0; }
.table-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s); overflow: hidden; }

.notes { display: grid; gap: 12px; }
.notes li {
  display: flex; gap: 12px; font-size: 14.5px; color: var(--ink-2);
  background: #fbfdfe; border: 1px solid var(--line-2); border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-s) var(--r-s) 0; padding: 14px 18px;
}
.notes li::before { content: "注"; flex: none; font-size: 12px; color: var(--accent); font-weight: 700; }

.tech { display: flex; flex-wrap: wrap; gap: 10px; }
.tech li {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; padding: 8px 15px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
}
.tech li svg { width: 14px; height: 14px; flex: none; color: var(--brand-2); }

.up   { color: var(--up); font-weight: 600; }
.down { color: var(--down); font-weight: 600; }
.demo { display: inline-flex; gap: 6px; align-items: center; font-size: 13px; }

/* ── 叙述段落 ─────────────────────────────────────── */
.story p {
  position: relative; padding-left: 20px; margin-bottom: 18px;
  font-size: 16.5px; line-height: 1.95; color: var(--ink-2);
}
.story p::before {
  content: ""; position: absolute; left: 0; top: 12px; bottom: 12px;
  width: 3px; border-radius: 2px; background: var(--tint, var(--brand-bg));
}
.story p:last-child { margin-bottom: 0; }
.story p:last-child::before { background: var(--accent, var(--brand)); }

/* ── 数字 ─────────────────────────────────────────── */
.numbers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.num { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s); padding: 20px 22px; }
.num-v { display: flex; align-items: baseline; gap: 6px; }
.num-v b {
  font-size: 33px; font-weight: 700; color: var(--accent, var(--brand));
  letter-spacing: -.02em; font-variant-numeric: tabular-nums; line-height: 1.1;
}
.num-v span { font-size: 13px; color: var(--ink-3); }
.num p { margin-top: 9px; font-size: 14px; color: var(--ink-2); }

/* ── 初始化向导 ───────────────────────────────────── */
.guide-grid { display: grid; grid-template-columns: 296px minmax(0, 1fr); gap: 30px; align-items: start; }
.guide-fig { margin: 0; }
.guide-fig a { display: block; border-radius: var(--r-s); overflow: hidden; border: 1px solid var(--line); background: #fff; transition: .2s; }
.guide-fig a:hover { border-color: var(--accent); box-shadow: var(--sh); }
.guide-fig img { width: 100%; height: auto; display: block; }
.guide-fig figcaption { margin-top: 10px; font-size: 12.5px; color: var(--ink-3); text-align: center; }

.steps { list-style: none; }
.steps li { display: flex; gap: 14px; padding: 13px 0; border-bottom: 1px dashed var(--line); }
.steps li:first-child { padding-top: 2px; }
.steps li:last-child { border-bottom: 0; }
.step-no {
  flex: none; width: 26px; height: 26px; margin-top: 2px; border-radius: 50%;
  display: grid; place-items: center; background: var(--tint, var(--brand-bg));
  color: var(--accent, var(--brand)); font-size: 12.5px; font-weight: 700;
}
.steps b { font-size: 14.5px; }
.steps p { margin-top: 3px; font-size: 13.5px; line-height: 1.72; color: var(--ink-2); }

.realtime {
  margin-top: 22px; padding: 18px 22px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-s);
}
.realtime-title { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.rt-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.rt b {
  display: block; font-size: 19px; font-weight: 700; line-height: 1.25;
  font-variant-numeric: tabular-nums; letter-spacing: -.01em;
}
.rt span { display: block; margin-top: 3px; font-size: 12.5px; color: var(--ink-3); }
.rt-1 b, .rt-2 b { color: #0bb07b; }   /* 能耗口径 · 绿 */
.rt-3 b          { color: #e08a2b; }   /* 用车总费用口径 · 橙 */

.shots-wrap { margin-top: 30px; }
.shots-label {
  font-size: 13.5px; color: var(--ink-2); margin-bottom: 14px;
  padding-left: 12px; border-left: 3px solid var(--accent, var(--brand));
}

/* ── 界面片段墙 ───────────────────────────────────── */
.shots {
  display: flex; gap: 22px; overflow-x: auto; padding: 6px 4px 20px;
  scroll-snap-type: x proximity; overscroll-behavior-x: contain;
}
.shots::-webkit-scrollbar { height: 8px; }
.shots::-webkit-scrollbar-track { background: var(--line-2); border-radius: 99px; }
.shots::-webkit-scrollbar-thumb { background: #c6d8e1; border-radius: 99px; }
.shots::-webkit-scrollbar-thumb:hover { background: #a9c2ce; }
.shot { flex: none; margin: 0; scroll-snap-align: start; }
.shot-cap {
  display: flex; gap: 8px; align-items: baseline; max-width: 375px;
  font-size: 13px; color: var(--ink-2); line-height: 1.55; margin-bottom: 10px; min-height: 40px;
}
.shot-cap b { color: var(--accent, var(--brand)); font-weight: 700; flex: none; }
.shots-hint { display: none; font-size: 12.5px; color: var(--ink-3); margin-top: -6px; }

/* ── 页脚 ─────────────────────────────────────────── */
.footer { margin-top: 40px; border-top: 1px solid var(--line); background: #fbfdfe; }
.footer-in {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between;
  align-items: center; padding: 30px 0; font-size: 13.5px; color: var(--ink-3);
}
.footer-in .f-brand { color: var(--ink); font-weight: 650; letter-spacing: .04em; }

/* 赞助行 */
.footer-sponsor {
  border-top: 1px dashed var(--line);
  background: #f7fbfc;
  text-align: center;
}
.sponsor-link {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 13px 0; font-size: 13px;
  color: var(--ink-2); text-decoration: none;
  transition: color .2s ease;
}
.sponsor-link svg { width: 17px; height: 17px; color: var(--brand); flex: none; }
.sponsor-link:hover { color: var(--brand); }
.sponsor-link:hover svg { color: var(--brand-2, var(--brand)); }
.sponsor-link:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 4px; }

/* ── 滚动入场 ─────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ── 响应式 ───────────────────────────────────────── */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .aside { position: static; }
  .app-grid, .feature-grid, .shared-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; gap: 24px; }
  .guide-fig { max-width: 320px; margin: 0 auto; }
  .rt-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .hero { padding: 54px 0 72px; }
  .hero-meta { gap: 24px; }
  .nav {
    display: none; position: absolute; top: 62px; left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 10px 18px 16px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--sh);
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 12px; }
  .nav-toggle {
    display: inline-flex; align-items: center; gap: 6px; margin-left: auto;
    background: none; border: 1px solid var(--line); border-radius: 999px;
    padding: 6px 13px; font-size: 13.5px; color: var(--ink-2); font-family: inherit; cursor: pointer;
  }
  .app-card { padding: 24px 22px; }
  .table td:first-child { white-space: normal; }
  .pagelist li { flex-direction: column; gap: 4px; }
  .numbers { grid-template-columns: 1fr; }
  .story p { font-size: 15.5px; }
  .shots-hint { display: block; }
}