:root {
  --ink: #17211b;
  --muted: #65716a;
  --paper: #f5f1e7;
  --card: rgba(255,255,255,.88);
  --green: #1e5a45;
  --green-2: #2f7a5f;
  --accent: #df8e3b;
  --line: #d9ded8;
  --shadow: 0 20px 50px rgba(39, 54, 45, .10);
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: radial-gradient(circle at 10% 0%, #fff9e8 0, transparent 38%), linear-gradient(180deg, #f0f4ed 0%, var(--paper) 70%); min-height: 100vh; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .24; background-image: linear-gradient(rgba(30,90,69,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(30,90,69,.08) 1px, transparent 1px); background-size: 32px 32px; mask-image: linear-gradient(to bottom, #000, transparent 55%); }
.shell { width: min(1100px, calc(100% - 32px)); margin: 0 auto; padding: 56px 0 80px; position: relative; }
.hero { display: flex; justify-content: space-between; align-items: center; gap: 28px; margin-bottom: 30px; }
.hero-copy { min-width: 0; }
.brand-strip { display: flex; align-items: center; gap: 14px; margin-bottom: 19px; }
.logo-card { width: 116px; height: 76px; display: grid; place-items: center; overflow: hidden; border: 1px solid rgba(30,90,69,.14); border-radius: 14px; background: rgba(255,255,255,.92); box-shadow: 0 8px 20px rgba(39,54,45,.08); }
.logo-card img { width: 100%; height: 100%; object-fit: contain; display: block; }
.logo-card-hongyuan img { width: 74px; height: 74px; }
.logo-card-lby img { width: 104px; height: 70px; }
.brand-divider { width: 1px; height: 40px; background: #c8d3cb; }
.eyebrow { color: var(--green-2); font-size: 13px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; margin: 0 0 10px; }
h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.08; margin: 0; letter-spacing: -.04em; font-family: Georgia, "Songti SC", serif; }
.lede { max-width: 680px; color: var(--muted); font-size: 17px; line-height: 1.7; margin: 15px 0 0; }
.source-badge { flex: 0 0 auto; padding: 10px 14px; border: 1px solid rgba(30,90,69,.22); border-radius: 999px; color: var(--green); font-size: 12px; background: rgba(255,255,255,.6); }
.card { background: var(--card); border: 1px solid rgba(255,255,255,.85); border-radius: 24px; padding: 28px; box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 24px; }
.section-heading > div { display: flex; align-items: center; gap: 12px; }
.section-heading span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: #e7eee9; color: var(--green); font-size: 12px; font-weight: 800; }
h2 { margin: 0; font-size: 20px; }
.ghost-button { border: 1px solid #cbd4cd; background: white; color: var(--green); border-radius: 11px; padding: 10px 14px; font-weight: 700; cursor: pointer; }
.field label { display: block; font-size: 13px; font-weight: 750; margin-bottom: 8px; }
input { width: 100%; border: 1px solid #ced6d0; border-radius: 12px; background: #fff; padding: 13px 14px; font-size: 16px; color: var(--ink); outline: none; transition: .2s; }
input:focus { border-color: var(--green-2); box-shadow: 0 0 0 4px rgba(47,122,95,.12); }
.destination-field { margin-bottom: 20px; }
.hint { color: var(--muted); font-size: 12px; margin: 7px 2px 0; }
.input-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.input-with-unit { position: relative; }
.input-with-unit input { padding-right: 46px; }
.input-with-unit span { position: absolute; right: 13px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 12px; }
.checkbox-row { display: inline-flex; align-items: center; gap: 9px; margin: 20px 0; color: var(--muted); font-size: 13px; cursor: pointer; }
.checkbox-row input { width: 17px; height: 17px; accent-color: var(--green); }
.auto-calculate-status { width: 100%; border-radius: 14px; padding: 14px 18px; background: #e8f0eb; color: var(--green); font-size: 14px; font-weight: 750; text-align: center; border: 1px solid #cbdacf; }
.form-error { padding: 12px 14px; margin: 0 0 14px; background: #fff0ed; border: 1px solid #f2c0b7; color: #9c3324; border-radius: 10px; font-size: 13px; }
.results { margin-top: 38px; }
.section-heading.simple { margin: 0 0 16px; }
.best-result { background: linear-gradient(135deg, #163e30, #2e7158); border-radius: 24px; color: white; padding: 30px; box-shadow: var(--shadow); display: grid; grid-template-columns: 1.4fr .8fr; gap: 22px; }
.best-kicker { color: #cfe8dc; font-size: 12px; font-weight: 800; letter-spacing: .12em; margin-bottom: 8px; }
.best-result h3 { font-size: clamp(27px,4vw,40px); margin: 0 0 10px; }
.best-summary { color: #dcebe4; line-height: 1.7; margin: 0; }
.best-price-wrap { text-align: right; align-self: center; }
.best-price { font-family: Georgia, serif; font-size: clamp(42px,6vw,68px); line-height: 1; }
.best-price small { font-family: inherit; font-size: .45em; }
.price-caption { color: #d2e8dd; font-size: 12px; margin-top: 8px; }
.metric-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.metric { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.16); border-radius: 9px; padding: 8px 10px; font-size: 12px; }
.comparison-heading { margin-top: 34px !important; }
.comparison-list { display: grid; gap: 12px; }
.option { background: rgba(255,255,255,.84); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; display: grid; grid-template-columns: minmax(150px,.7fr) 1.4fr auto; align-items: center; gap: 18px; }
.option.best { border-color: #8bb39f; box-shadow: 0 8px 26px rgba(30,90,69,.08); }
.option-name { font-weight: 850; }
.option-type { display: inline-block; margin-left: 7px; color: var(--muted); font-size: 11px; font-weight: 500; }
.option-detail { color: var(--muted); font-size: 13px; line-height: 1.55; }
.option-price { text-align: right; font-size: 22px; font-weight: 850; white-space: nowrap; }
.option.unavailable { opacity: .58; }
.tag { display: inline-block; margin-left: 7px; padding: 3px 7px; border-radius: 999px; background: #e0eee7; color: var(--green); font-size: 10px; font-weight: 800; vertical-align: 2px; }
.notes { margin-top: 18px; padding: 17px 20px; border-left: 4px solid var(--accent); background: #fff8ec; color: #66533d; font-size: 13px; line-height: 1.7; border-radius: 0 12px 12px 0; }
.methodology { margin-top: 34px; box-shadow: none; background: rgba(255,255,255,.55); }
.methodology ul { margin: 0; padding-left: 22px; color: var(--muted); line-height: 1.8; font-size: 13px; }
code { padding: 2px 5px; background: #edf0ec; border-radius: 4px; color: #3a5446; }
@media (max-width: 780px) { .shell { width: min(100% - 22px, 1100px); padding-top: 30px; } .hero { display: block; } .source-badge { display: inline-block; margin-top: 18px; } .card { padding: 20px; border-radius: 18px; } .input-grid { grid-template-columns: repeat(2,1fr); } .input-grid .field:last-child { grid-column: span 2; } .best-result { grid-template-columns: 1fr; } .best-price-wrap { text-align: left; } .option { grid-template-columns: 1fr auto; } .option-detail { grid-column: 1 / -1; grid-row: 2; } }
@media (max-width: 480px) { .section-heading { align-items: flex-start; } .ghost-button { max-width: 140px; } .input-grid { grid-template-columns: 1fr; } .input-grid .field:last-child { grid-column: auto; } .option { grid-template-columns: 1fr; } .option-price { text-align: left; } }