:root {
  --ink: #102f39;
  --ink-soft: #31515a;
  --muted: #5e7478;
  --paper: #f7fbfa;
  --paper-light: #ffffff;
  --paper-deep: #edf5f2;
  --line: #c8d9d6;
  --seal: #c83f2f;
  --seal-dark: #a93629;
  --jade: #4a9677;
  --jade-light: #dcebe8;
  --qing: #177f86;
  --qing-deep: #0d626a;
  --bronze: #648da0;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(16, 47, 57, .10);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image: url("assets/rice-paper.webp");
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: .01em;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, .brand strong {
  font-family: "STKaiti", "KaiTi", "FangSong", "Microsoft YaHei", serif;
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: rgba(243, 239, 227, .96);
  background-image: url("assets/rice-paper.webp");
  border-bottom: 1px solid rgba(61, 64, 56, .18);
  backdrop-filter: blur(12px);
}
.nav {
  max-width: var(--max);
  min-height: 76px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 238px; }
.brand img { width: 44px; height: 44px; object-fit: contain; filter: saturate(.65) contrast(1.05); }
.brand strong { display: block; font-size: 17px; letter-spacing: .06em; }
.brand small { display: block; color: var(--muted); font-size: 10px; letter-spacing: .18em; }
.nav-links { display: flex; align-items: center; gap: 25px; font-size: 13px; color: var(--ink-soft); }
.nav-links a { position: relative; padding: 28px 0 23px; }
.nav-links a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 18px; height: 1px; background: var(--seal); transition: .2s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--seal-dark); }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { left: 0; right: 0; }
.nav-cta { display: inline-flex; align-items: center; min-height: 40px; padding: 0 15px; color: var(--paper-light); background: var(--ink); border: 1px solid var(--ink); font-size: 13px; letter-spacing: .04em; }
.nav-cta:hover { background: var(--seal-dark); border-color: var(--seal-dark); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-size: 20px; }

.hero {
  position: relative;
  min-height: 660px;
  display: flex;
  align-items: center;
  color: var(--ink);
  background-color: var(--paper);
  background-image: url("assets/office-main.jpg"), url("assets/rice-paper.webp");
  background-repeat: no-repeat, repeat;
  background-position: right center, left top;
  background-size: 46% 100%, 512px 512px;
  background-blend-mode: luminosity, normal;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero::before {
  content: "白泽图";
  position: absolute;
  right: calc(46% + 24px);
  top: 74px;
  color: rgba(29, 32, 28, .07);
  font-family: "STKaiti", "KaiTi", serif;
  font-size: clamp(80px, 12vw, 170px);
  line-height: 1;
  writing-mode: vertical-rl;
  letter-spacing: .1em;
  pointer-events: none;
}
.hero::after { content: ""; position: absolute; top: 0; bottom: 0; right: 46%; width: 1px; background: rgba(29, 32, 28, .22); }
.hero-inner { position: relative; z-index: 1; width: 100%; max-width: var(--max); margin: 0 auto; padding: 102px 52% 86px 28px; }
.eyebrow { display: inline-block; margin: 0 0 18px; padding: 4px 9px; color: var(--paper-light); background: var(--seal); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.hero h1 { max-width: 620px; margin: 0; font-size: clamp(42px, 6vw, 72px); line-height: 1.13; letter-spacing: .02em; }
.hero h1 span { display: block; margin-top: 16px; color: var(--seal-dark); font-size: .45em; line-height: 1.4; }
.hero-copy { max-width: 610px; margin: 26px 0 0; color: var(--ink-soft); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 45px; padding: 0 18px; border: 1px solid var(--ink); background: transparent; color: var(--ink); font-size: 13px; font-weight: 700; letter-spacing: .04em; }
.button.primary { color: var(--paper-light); background: var(--seal); border-color: var(--seal); }
.button.primary:hover { background: var(--seal-dark); border-color: var(--seal-dark); }
.button.ghost { border-color: var(--ink); color: var(--ink); }
.button.ghost:hover { background: var(--ink); color: var(--paper-light); }
.button.dark { background: var(--ink); color: var(--paper-light); }
.button.dark:hover { background: var(--jade); border-color: var(--jade); }
.hero-note { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.hero-note b { color: var(--ink); font-weight: 700; }

.band { width: 100%; background-color: transparent; }
.band.white { background-color: rgba(255, 254, 248, .76); }
.band.teal { background-color: var(--qing-deep); color: var(--paper-light); }
.band.ink { background-color: #0b343c; color: var(--paper-light); }
.section { max-width: var(--max); margin: 0 auto; padding: 92px 28px; }
.section.compact { padding-top: 54px; padding-bottom: 54px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 40px; }
.section-kicker { margin: 0 0 10px; color: var(--seal); font-size: 11px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.on-dark .section-kicker { color: #d99082; }
.section h2 { max-width: 760px; margin: 0; font-size: clamp(29px, 4.2vw, 49px); line-height: 1.24; letter-spacing: .03em; }
.section-intro { max-width: 600px; margin: 16px 0 0; color: var(--muted); }
.on-dark .section-intro { color: rgba(250, 248, 240, .72); }
.text-link { color: var(--seal-dark); font-weight: 700; white-space: nowrap; }
.text-link:hover { color: var(--jade); }

.proof-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.proof-item { position: relative; padding: 22px 20px; border-right: 1px solid var(--line); }
.proof-item::before { content: ""; position: absolute; left: 0; top: 0; width: 18px; height: 2px; background: var(--seal); }
.proof-item:last-child { border-right: 0; }
.proof-item strong { display: block; font-family: "STKaiti", "KaiTi", serif; font-size: 22px; }
.proof-item span { color: var(--muted); font-size: 12px; }

.split { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr); gap: 72px; align-items: center; }
.split.reverse > :first-child { order: 2; }
.split.reverse > :last-child { order: 1; }
.image-frame { position: relative; overflow: hidden; min-height: 360px; background: var(--paper-deep); border: 1px solid var(--line); box-shadow: 14px 14px 0 rgba(142, 116, 73, .10); }
.image-frame img { width: 100%; height: 100%; min-height: 360px; object-fit: cover; filter: grayscale(.72) sepia(.2) contrast(1.06); mix-blend-mode: multiply; }
.image-caption { position: absolute; left: 0; bottom: 0; right: 0; padding: 12px 16px; background: rgba(29, 32, 28, .88); color: var(--paper-light); font-size: 11px; letter-spacing: .04em; }
.number-list { margin: 28px 0 0; padding: 0; list-style: none; counter-reset: item; }
.number-list li { position: relative; padding: 0 0 22px 54px; border-bottom: 1px solid var(--line); margin-bottom: 22px; counter-increment: item; }
.number-list li::before { content: counter(item, cjk-ideographic); position: absolute; left: 0; top: 0; width: 31px; height: 31px; display: grid; place-items: center; color: var(--paper-light); background: var(--seal); font-family: "STKaiti", "KaiTi", serif; font-size: 14px; }
.number-list strong { display: block; margin-bottom: 5px; font-size: 17px; }
.number-list span { color: var(--muted); font-size: 14px; }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 44px; background: rgba(250, 248, 240, .22); border: 1px solid rgba(250, 248, 240, .20); }
.method-step { min-height: 194px; padding: 25px; background: var(--ink-soft); border-right: 1px solid rgba(250, 248, 240, .16); }
.method-step:last-child { border-right: 0; }
.method-step b { display: block; margin-bottom: 26px; color: #d99082; font-size: 12px; letter-spacing: .12em; }
.method-step strong { display: block; margin-bottom: 10px; color: var(--paper-light); font-family: "STKaiti", "KaiTi", serif; font-size: 21px; }
.method-step p { margin: 0; color: rgba(250, 248, 240, .68); font-size: 13px; }

.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 38px; }
.metric { position: relative; padding: 28px 22px; background: rgba(255, 254, 248, .72); border: 1px solid var(--line); }
.metric::after { content: ""; position: absolute; right: 10px; top: 10px; width: 9px; height: 9px; background: var(--seal); opacity: .76; }
.metric strong { display: block; font-family: "STKaiti", "KaiTi", serif; font-size: clamp(28px, 4vw, 44px); line-height: 1; }
.metric span { display: block; margin-top: 12px; color: var(--muted); font-size: 12px; }
.metric.teal-edge { border-color: #9cad9d; }

.service-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-item { position: relative; padding: 30px 26px; background: rgba(255, 254, 248, .78); border: 1px solid var(--line); }
.service-item::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--ink); }
.service-item:nth-child(2)::before { background: var(--jade); }
.service-item:nth-child(3)::before { background: var(--seal); }
.service-item h3 { margin: 0 0 12px; font-size: 22px; }
.service-item p { margin: 0; color: var(--muted); font-size: 14px; }
.service-item a { display: inline-block; margin-top: 22px; color: var(--seal-dark); font-size: 13px; font-weight: 750; }

.business-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 38px; border: 1px solid var(--line); background: var(--line); }
.business-item { min-height: 230px; padding: 26px 24px; background: var(--paper-light); }
.business-item b { display: block; margin-bottom: 28px; color: var(--seal); font-size: 12px; letter-spacing: .12em; }
.business-item h3 { margin: 0 0 12px; font-size: 21px; }
.business-item p { margin: 0; color: var(--muted); font-size: 13px; }
.business-item a { display: inline-block; margin-top: 20px; color: var(--jade); font-size: 12px; font-weight: 700; }

.price-table { width: 100%; border-collapse: collapse; background: rgba(255, 254, 248, .86); border: 1px solid var(--ink); }
.price-table th, .price-table td { padding: 16px 14px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); text-align: left; vertical-align: top; }
.price-table th:last-child, .price-table td:last-child { border-right: 0; }
.price-table th { background: var(--paper-deep); color: var(--ink-soft); font-size: 12px; }
.price-table td { font-size: 14px; }
.price-table td strong { font-family: "STKaiti", "KaiTi", serif; font-size: 21px; }
.price-table tr:last-child td { border-bottom: 0; }
.price-note { margin-top: 15px; color: var(--muted); font-size: 12px; }

.tag-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.tag { display: inline-flex; align-items: center; min-height: 30px; padding: 0 10px; color: #365244; background: var(--jade-light); border: 1px solid #aebcaf; font-size: 11px; font-weight: 700; }
.tag.orange { color: var(--seal-dark); background: #efe0d7; border-color: #d2a99e; }
.quote { margin: 0; padding: 29px 31px; border-left: 4px solid var(--seal); background: rgba(255, 254, 248, .74); font-family: "STKaiti", "KaiTi", serif; font-size: 22px; line-height: 1.65; }
.quote small { display: block; margin-top: 16px; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
.contact-box { padding: 32px; background: var(--paper-light); color: var(--ink); border-top: 3px solid var(--seal); }
.contact-box h3 { margin: 0 0 18px; font-size: 22px; }
.contact-line { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-line:last-child { border-bottom: 0; }
.contact-line b { min-width: 72px; color: var(--muted); font-size: 12px; }
.contact-line a { color: var(--seal-dark); font-weight: 700; }
.contact-copy { color: rgba(250, 248, 240, .72); }
.contact-copy h2 { color: var(--paper-light); }

.site-footer { background: #0b343c; color: rgba(255, 255, 255, .72); border-top: 4px solid var(--qing); }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 42px 28px 26px; }
.footer-top { display: flex; justify-content: space-between; gap: 32px; align-items: start; }
.footer-brand { display: flex; align-items: center; gap: 12px; color: var(--paper-light); }
.footer-brand img { width: 42px; height: 42px; object-fit: contain; filter: grayscale(.3); }
.footer-brand small { display: block; color: rgba(255, 255, 255, .52); font-size: 10px; letter-spacing: .08em; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px 22px; font-size: 12px; }
.footer-links a:hover { color: #d99082; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; margin-top: 34px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .16); font-size: 11px; }

.page-hero { position: relative; padding: 94px 28px 78px; color: var(--ink); background-color: var(--paper-deep); background-image: radial-gradient(circle at 82% 28%, rgba(23, 127, 134, .12), transparent 31%), url("assets/rice-paper.webp"); border-bottom: 5px solid var(--qing); overflow: hidden; }
.page-hero::after { content: "白泽图"; position: absolute; right: 4vw; top: 22px; color: rgba(23, 127, 134, .07); font-family: "STKaiti", "KaiTi", serif; font-size: clamp(76px, 13vw, 165px); letter-spacing: .08em; }
.page-hero-inner { position: relative; z-index: 1; max-width: var(--max); margin: 0 auto; }
.page-hero h1 { max-width: 830px; margin: 0; font-size: clamp(38px, 5.3vw, 66px); line-height: 1.18; letter-spacing: .03em; }
.page-hero p { max-width: 760px; margin: 22px 0 0; color: var(--ink-soft); font-size: 17px; }
.breadcrumb { max-width: var(--max); margin: 0 auto; padding: 18px 28px 0; color: var(--muted); font-size: 11px; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.content-block { position: relative; padding: 28px; background: rgba(255, 254, 248, .78); border: 1px solid var(--line); }
.content-block::before { content: ""; position: absolute; left: 0; top: 0; width: 34px; height: 3px; background: var(--jade); }
.content-block:nth-child(2n)::before { background: var(--seal); }
.content-block h3 { margin: 0 0 12px; font-size: 21px; }
.content-block p { margin: 0; color: var(--muted); font-size: 14px; }
.content-block ul { margin: 14px 0 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.content-block li + li { margin-top: 7px; }
.detail-table { width: 100%; border-collapse: collapse; margin-top: 26px; background: rgba(255, 254, 248, .86); border: 1px solid var(--line); }
.detail-table th, .detail-table td { padding: 14px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 14px; }
.detail-table th { color: var(--muted); font-size: 12px; }
.detail-table tr:last-child td { border-bottom: 0; }
.callout { margin-top: 28px; padding: 24px 26px; background: var(--jade-light); border-left: 4px solid var(--jade); }
.callout strong { display: block; margin-bottom: 6px; }
.callout p { margin: 0; color: #385247; font-size: 14px; }
.status { display: inline-flex; align-items: center; gap: 7px; color: var(--jade); font-size: 13px; font-weight: 700; }
.status::before { content: ""; width: 8px; height: 8px; background: var(--seal); }
.seal-mark { display: inline-grid; place-items: center; width: 64px; height: 64px; color: var(--seal); border: 2px solid var(--seal); font-family: "STKaiti", "KaiTi", serif; font-size: 22px; line-height: 1.05; text-align: center; }

.signal-visual {
  position: relative;
  min-height: 390px;
  padding: 48px 34px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--ink);
  background-color: rgba(255, 255, 255, .78);
  background-image: radial-gradient(circle at 50% 45%, rgba(23, 127, 134, .10), transparent 34%), url("assets/rice-paper.webp");
  border: 1px solid var(--line);
  box-shadow: 18px 18px 0 rgba(23, 127, 134, .07);
  text-align: center;
}
.signal-visual::before,
.signal-visual::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px dashed rgba(23, 127, 134, .22);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.signal-visual::before { width: 310px; height: 310px; animation: signal-turn 32s linear infinite; }
.signal-visual::after { width: 238px; height: 238px; border-color: rgba(74, 150, 119, .24); animation: signal-turn 24s linear infinite reverse; }
.signal-visual > strong { position: relative; z-index: 1; color: var(--qing-deep); font-family: "STKaiti", "KaiTi", serif; font-size: clamp(44px, 6vw, 72px); line-height: 1; letter-spacing: .08em; }
.signal-visual > div { position: relative; z-index: 1; margin-top: 38px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.signal-visual > div span { min-height: 34px; padding: 0 11px; display: inline-flex; align-items: center; justify-content: center; color: var(--qing-deep); background: rgba(255, 255, 255, .88); border: 1px solid rgba(23, 127, 134, .30); font-size: 10px; font-weight: 700; white-space: nowrap; }
.signal-visual > div i { width: 20px; height: 1px; background: var(--seal); animation: signal-line 2.2s ease-in-out infinite; }
.signal-visual > p { position: relative; z-index: 1; margin: 24px 0 0; color: var(--muted); font-size: 12px; }
.signal-visual-location > strong { font-size: clamp(37px, 5vw, 58px); }
.signal-visual-location > div, .signal-visual-region > div { gap: 7px; }
.signal-visual-location > div i, .signal-visual-region > div i { width: 12px; }
.signal-visual-system > strong { color: var(--seal); }
.signal-visual-system > div span { width: 39px; padding: 0; border-radius: 50%; }

@keyframes signal-turn { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes signal-line { 0%, 100% { transform: scaleX(.35); opacity: .4; } 50% { transform: scaleX(1); opacity: 1; } }

@media (max-width: 980px) {
  .nav-links { position: absolute; left: 0; right: 0; top: 76px; display: none; padding: 12px 28px 20px; background-color: var(--paper); background-image: url("assets/rice-paper.webp"); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .nav-links.open { display: grid; gap: 0; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-links a::after { display: none; }
  .nav-links a:last-child { border-bottom: 0; }
  .nav-cta { display: none; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .brand { min-width: 0; }
  .hero { min-height: 610px; background-size: 42% 100%, 512px 512px; }
  .hero::after { right: 42%; }
  .hero::before { right: calc(42% + 12px); font-size: 98px; }
  .hero-inner { padding-right: 46%; }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .split.reverse > :first-child, .split.reverse > :last-child { order: initial; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); }
  .proof-item:nth-child(2) { border-right: 0; }
  .proof-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .method-grid, .business-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .service-list, .content-grid { grid-template-columns: 1fr; }
  .section-head { display: block; }
  .section-head .text-link { display: inline-block; margin-top: 18px; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .nav { min-height: 68px; padding: 0 18px; }
  .nav-links { top: 68px; padding-left: 18px; padding-right: 18px; }
  .brand strong { font-size: 14px; }
  .brand small { font-size: 8px; }
  .hero { min-height: auto; background-image: url("assets/rice-paper.webp"); background-size: 512px 512px; background-repeat: repeat; }
  .hero::after { display: none; }
  .hero::before { right: -24px; top: 54px; font-size: 88px; }
  .hero-inner { padding: 82px 18px 60px; }
  .hero h1 { font-size: 42px; }
  .hero-copy { font-size: 16px; }
  .section, .page-hero, .breadcrumb { padding-left: 18px; padding-right: 18px; }
  .section { padding-top: 66px; padding-bottom: 66px; }
  .proof-item { padding: 18px 13px; }
  .proof-item strong { font-size: 18px; }
  .method-grid, .business-grid, .metric-grid { grid-template-columns: 1fr; }
  .method-step, .business-item { min-height: auto; }
  .price-table { display: block; overflow-x: auto; }
  .price-table th, .price-table td { min-width: 132px; }
  .signal-visual { min-height: 330px; padding: 34px 18px; }
  .signal-visual::before { width: 270px; height: 270px; }
  .signal-visual::after { width: 205px; height: 205px; }
  .signal-visual > div { flex-wrap: wrap; }
  .signal-visual > div i { width: 10px; }
  .footer-top, .footer-bottom { display: block; }
  .footer-links { margin-top: 22px; }
  .footer-bottom > * + * { display: block; margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}