@import url("https://fontsapi.zeoseven.com/24/main/result.css");

:root {
  --bg: #0f0f10;
  --bg-soft: #17181b;
  --panel: #1e1f23;
  --text: #ece8e0;
  --muted: #aaa59c;
  --accent: #a58a62;
  --line: rgba(236, 232, 224, 0.13);
  --shell: min(1180px, calc(100vw - 96px));
  --font-display: "LXGW Heart Serif", "Source Han Serif SC", "Noto Serif CJK SC", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-latin: "Bodoni 72", Didot, Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-body);
  line-height: 1.8;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.site-texture {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: url("https://biyedaxiyinxiao-1304768843.cos.ap-shanghai.myqcloud.com/longsanyuan_pic/%E4%B9%A6%E6%B3%95%E6%9A%97%E7%BA%B9%E5%B9%B3%E9%93%BA.png") repeat;
  background-size: 320px 320px;
  opacity: .48;
}
.site-header, main { position: relative; z-index: 1; }
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 78px;
  padding: 0 48px;
  border-bottom: 1px solid transparent;
  transition: background .4s, border-color .4s;
}
.site-header.scrolled {
  background: rgba(15, 15, 16, .86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border: 1px solid rgba(165, 138, 98, .6);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .12em;
}
.brand-name { font-family: var(--font-display); font-size: 15px; letter-spacing: .22em; }
.main-nav { display: flex; gap: 30px; align-items: center; font-size: 13px; color: var(--muted); }
.main-nav a { transition: color .25s; }
.main-nav a:hover { color: var(--text); }
.main-nav .nav-contact { margin-left: 10px; color: var(--accent); }
.menu-button { display: none; }
.section { position: relative; }
.section-shell { width: var(--shell); margin: auto; padding: 148px 0; }
.section-index {
  margin-bottom: 54px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: .2em;
}
.eyebrow { color: var(--accent); font-family: var(--font-latin); font-size: 11px; letter-spacing: .28em; }
.section-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.3;
  letter-spacing: .1em;
}
.hero {
  display: grid;
  grid-template-columns: minmax(310px, 450px) 1fr;
  gap: clamp(60px, 9vw, 140px);
  align-items: center;
  width: var(--shell);
  min-height: 100vh;
  margin: auto;
  padding: 118px 0 76px;
  overflow: hidden;
}
.hero-watermark {
  position: absolute;
  right: -12vw;
  top: 16%;
  width: clamp(560px, 48vw, 820px);
  opacity: .018;
  transform: rotate(-12deg);
  pointer-events: none;
}
.hero-portrait-wrap { position: relative; z-index: 1; }
.hero-portrait-wrap::before {
  content: "";
  position: absolute;
  inset: -18px 18px 18px -18px;
  z-index: -1;
  border: 1px solid rgba(165, 138, 98, .36);
}
.portrait-number {
  position: absolute;
  top: -48px; left: -18px;
  color: var(--accent);
  font-family: Arial, sans-serif;
  font-size: 11px;
  letter-spacing: .2em;
}
.hero-portrait { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; filter: saturate(.76) contrast(.94); }
.portrait-caption { margin: 18px 0 0; color: var(--muted); font-size: 12px; letter-spacing: .2em; }
.hero-copy { position: relative; z-index: 1; }
.hero h1 { margin: 20px 0 4px; font-family: var(--font-display); font-weight: 300; font-size: clamp(72px, 8vw, 124px); line-height: 1.08; letter-spacing: .18em; }
.hero-motto { margin: 0; color: var(--accent); font-family: var(--font-display); font-size: clamp(17px, 1.8vw, 22px); letter-spacing: .12em; }
.hero-description { margin: 34px 0; color: var(--muted); font-size: 16px; line-height: 2.15; }
.hero-actions { display: flex; gap: 14px; align-items: center; margin-top: 40px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 142px;
  padding: 13px 20px;
  border: 1px solid transparent;
  font-size: 13px;
  letter-spacing: .15em;
  transition: all .3s;
}
.button-primary { color: #151515; background: var(--accent); }
.button-primary:hover { background: #b79a70; transform: translateY(-2px); }
.button-ghost { color: var(--muted); border-color: var(--line); }
.button-ghost:hover { color: var(--text); border-color: var(--accent); }
.button-ghost span { margin-left: 8px; }
.hero-scroll {
  position: absolute;
  bottom: 26px; right: 0;
  display: flex; gap: 10px; align-items: center;
  color: var(--muted);
  font-size: 10px; letter-spacing: .24em;
  writing-mode: vertical-rl;
}
.hero-scroll span { display: block; width: 1px; height: 54px; background: var(--accent); }
.about { background: rgba(23, 24, 27, .72); }
.about-grid { display: grid; grid-template-columns: 40% 1fr; gap: 72px; }
.about-content { max-width: 660px; color: var(--muted); font-size: 16px; }
.about-content .lead { margin-top: 3px; color: var(--text); font-family: var(--font-display); font-size: 23px; line-height: 1.85; }
.principle-line { display: flex; gap: 36px; margin-top: 50px; color: var(--accent); font-family: var(--font-display); font-size: 16px; letter-spacing: .16em; }
.philosophy-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 72px; }
.philosophy-card { min-height: 292px; padding: 30px; border: 1px solid var(--line); background: rgba(30, 31, 35, .44); transition: background .35s, transform .35s; }
.philosophy-card + .philosophy-card { border-left: 0; }
.philosophy-card:hover { background: rgba(30, 31, 35, .9); transform: translateY(-8px); }
.philosophy-card span, .service-no { color: var(--accent); font-family: Arial, sans-serif; font-size: 11px; letter-spacing: .18em; }
.philosophy-card h3 { margin: 48px 0 20px; font-family: var(--font-display); font-size: 27px; font-weight: 300; letter-spacing: .14em; }
.philosophy-card p { color: var(--muted); font-size: 14px; line-height: 2; }
.services { background: rgba(23, 24, 27, .72); }
.section-heading-row { display: flex; justify-content: space-between; gap: 36px; align-items: end; }
.section-note { max-width: 330px; color: var(--muted); font-size: 14px; }
.service-list { margin-top: 64px; border-top: 1px solid var(--line); }
.service-item {
  display: grid;
  grid-template-columns: 72px 1fr 34%;
  gap: 26px;
  padding: 34px 10px;
  border-bottom: 1px solid var(--line);
  transition: background .3s, padding .3s;
}
.service-item:hover { padding-left: 20px; padding-right: 20px; background: rgba(30, 31, 35, .55); }
.service-item h3 { margin: 0; font-family: var(--font-display); font-size: 22px; font-weight: 300; letter-spacing: .12em; }
.service-item p { max-width: 480px; margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.service-item ul { display: flex; flex-wrap: wrap; gap: 8px; align-content: center; margin: 0; padding: 0; list-style: none; }
.service-item li { padding: 3px 10px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.service-ethics { display: flex; gap: 34px; margin-top: 40px; color: var(--accent); font-size: 13px; letter-spacing: .16em; }
.process-list { display: grid; grid-template-columns: repeat(5, 1fr); margin: 64px 0 0; padding: 0; list-style: none; }
.process-list li { position: relative; min-height: 204px; padding: 0 22px; border-left: 1px solid var(--line); }
.process-list li::before { content: ""; position: absolute; top: 4px; left: -4px; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.process-list span { color: var(--accent); font-family: Arial, sans-serif; font-size: 11px; letter-spacing: .18em; }
.process-list strong { display: block; margin-top: 38px; font-family: var(--font-display); font-size: 17px; font-weight: 300; letter-spacing: .14em; }
.process-list p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.faq { background: rgba(23, 24, 27, .72); }
.faq-grid { display: grid; grid-template-columns: 42% 1fr; gap: 80px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; cursor: pointer; list-style: none; font-size: 16px; letter-spacing: .1em; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { color: var(--accent); font-family: Arial, sans-serif; font-size: 24px; font-weight: 200; transition: transform .3s; }
.faq-item[open] summary span { transform: rotate(45deg); }
.faq-item p { margin: -4px 42px 22px 0; color: var(--muted); font-size: 14px; line-height: 2; }
.contact { background: rgba(15, 15, 16, .52); }
.contact-inner { padding-bottom: 30px; }
.contact-grid { display: grid; grid-template-columns: 36% 1fr; gap: 100px; align-items: center; padding: 0 8%; }
.qr-card { padding: 24px; border: 1px solid var(--line); background: rgba(30, 31, 35, .66); text-align: center; }
.qr-image-wrap { padding: 10px; background: #c5c0b7; }
.qr-image { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; filter: brightness(.82) contrast(1.14) saturate(.72); }
.qr-card p { margin: 17px 0 0; color: var(--muted); font-size: 12px; letter-spacing: .18em; }
.contact-title { margin: 16px 0 24px; font-family: var(--font-display); font-size: clamp(46px, 6vw, 78px); font-weight: 300; line-height: 1.35; letter-spacing: .15em; }
.contact-copy > p:not(.eyebrow) { margin-bottom: 30px; color: var(--muted); font-size: 15px; }
.site-footer { display: flex; justify-content: space-between; margin-top: 130px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-family: Arial, sans-serif; font-size: 10px; letter-spacing: .16em; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .9s ease, transform .9s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 860px) {
  :root { --shell: min(100% - 42px, 680px); }
  .site-header { height: 68px; padding: 0 21px; }
  .menu-button { display: grid; gap: 7px; padding: 10px 0 10px 10px; border: 0; background: transparent; cursor: pointer; }
  .menu-button span { display: block; width: 24px; height: 1px; background: var(--text); transition: transform .3s; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .main-nav { position: fixed; inset: 68px 0 auto; display: grid; gap: 0; padding: 10px 21px 18px; background: rgba(15,15,16,.97); border-bottom: 1px solid var(--line); opacity: 0; pointer-events: none; transform: translateY(-12px); transition: all .3s; }
  .main-nav.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .main-nav a { display: flex; align-items: center; min-height: 44px; padding: 7px 0; }
  .main-nav .nav-contact { margin-left: 0; }
  .section-shell { padding: 106px 0; }
  .section-index { margin-bottom: 40px; }
  .hero { display: block; min-height: auto; padding: 128px 0 88px; }
  .hero-portrait-wrap { width: min(78vw, 360px); margin: 0 0 58px 18px; }
  .hero-watermark { top: 44%; right: -45vw; width: 820px; }
  .hero h1 { font-size: 74px; }
  .hero-description { font-size: 15px; }
  .hero-scroll { display: none; }
  .about-grid, .faq-grid, .contact-grid { display: block; }
  .about-content { margin-top: 34px; }
  .about-content .lead { font-size: 19px; }
  .principle-line, .service-ethics { flex-wrap: wrap; gap: 12px 22px; }
  .philosophy-grid { display: block; margin-top: 44px; }
  .philosophy-card + .philosophy-card { border-top: 0; border-left: 1px solid var(--line); }
  .section-heading-row { display: block; }
  .service-list { margin-top: 38px; }
  .service-item { display: block; padding: 24px 4px; }
  .service-item h3 { margin-top: 12px; }
  .service-item ul { margin-top: 16px; }
  .process-list { grid-template-columns: 1fr; margin-top: 44px; }
  .process-list li { min-height: auto; padding: 0 0 26px 24px; }
  .process-list strong { margin-top: 12px; }
  .faq-list { margin-top: 42px; }
  .contact-grid { padding: 0 4%; }
  .qr-card { max-width: 300px; margin-bottom: 48px; }
  .site-footer { display: grid; gap: 8px; margin-top: 84px; }
}
@media (max-width: 380px) {
  :root { --shell: calc(100vw - 36px); }
  .site-header { padding: 0 18px; }
  .brand { gap: 11px; }
  .brand-mark { width: 34px; height: 34px; font-size: 11px; }
  .brand-name { font-size: 14px; }
  .section-shell { padding: 88px 0; }
  .section-index { margin-bottom: 32px; }
  .eyebrow { font-size: 10px; letter-spacing: .2em; }
  .hero { padding: 118px 0 72px; }
  .hero-portrait-wrap { width: calc(100% - 18px); margin-bottom: 50px; }
  .hero h1 { font-size: 66px; letter-spacing: .14em; }
  .hero-motto { font-size: 16px; letter-spacing: .08em; }
  .hero-description { margin: 27px 0; font-size: 14px; line-height: 2; }
  .hero-actions { display: grid; gap: 10px; margin-top: 28px; }
  .button { min-height: 46px; width: 100%; }
  .section-title { font-size: 32px; }
  .about-content .lead { font-size: 18px; }
  .philosophy-card { min-height: 250px; padding: 25px; }
  .philosophy-card h3 { margin-top: 34px; }
  .service-ethics { font-size: 12px; }
  .faq-item summary { font-size: 15px; }
  .contact-title { font-size: 45px; }
  .qr-card { max-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}