/* ============ 设计令牌：源自 ROFO 北京SKP 渲染图 ============ */
:root {
  --bg: #0a0a0a;
  --bg-soft: #111111;
  --bg-card: #141414;

  /* 主色调：铜色金属（来自店面外立面与 LOGO） */
  --copper: #c17a3a;
  --copper-soft: #a05a2c;
  --copper-glow: rgba(193, 122, 58, 0.14);

  /* 点缀色：蓝绿奢石 / 拉长石（来自空间立柱与墙面） */
  --teal: #0d7c7b;
  --teal-soft: #0a5f5e;
  --teal-glow: rgba(13, 124, 123, 0.14);

  --ivory: #f4f1ea;
  --muted: #8a8580;
  --line: rgba(193, 122, 58, 0.35);

  --serif: "Cormorant Garamond", "Songti SC", serif;
  --sans: "Inter", "PingFang SC", "Helvetica Neue", sans-serif;

  --maxw: 1280px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ivory);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  letter-spacing: 0.02em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ============ 指针柔光晕：铜 + 松石绿 ============ */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 480px; height: 480px;
  margin: -240px 0 0 -240px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 40%, var(--copper-glow) 0%, transparent 55%),
    radial-gradient(circle at 70% 60%, var(--teal-glow) 0%, transparent 55%);
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: 60;
  opacity: 0;
  transition: opacity .4s ease;
  will-change: transform;
}

/* ============ 隐藏式导航 ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 22px var(--gutter);
  background: linear-gradient(180deg, rgba(10,10,10,0.94), rgba(10,10,10,0));
  transform: translateY(-100%);
  opacity: 0;
  transition: transform .5s cubic-bezier(.2,.8,.2,1), opacity .5s ease;
}
.nav.is-visible { transform: translateY(0); opacity: 1; }

.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0.35em;
  font-weight: 400;
}
.nav__links { display: flex; gap: clamp(18px, 3vw, 44px); }
.nav__links a {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  position: relative;
  transition: color .3s ease;
}
.nav__links a::after {
  content: "";
  position: absolute; left: 50%; bottom: -6px;
  width: 0; height: 1px; background: var(--copper);
  transform: translateX(-50%);
  transition: width .3s ease;
}
.nav__links a:hover { color: var(--ivory); }
.nav__links a:hover::after { width: 100%; }

/* ============ 细金线分隔（对称） ============ */
.rule--center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 0 auto;
}
.rule__line {
  height: 1px;
  width: clamp(60px, 14vw, 160px);
  background: linear-gradient(90deg, transparent, var(--copper));
}
.rule__line:last-child { background: linear-gradient(90deg, var(--copper), transparent); }
.rule__dot {
  width: 5px; height: 5px;
  border: 1px solid var(--teal);
  background: rgba(13, 124, 123, 0.2);
  transform: rotate(45deg);
}

/* ============ 首屏 Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 var(--gutter);
  overflow: hidden;
}
.hero__aura {
  position: absolute;
  z-index: 2;
  top: 38%; left: 50%;
  width: 70vw; height: 70vw;
  max-width: 820px; max-height: 820px;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(circle at 40% 45%, var(--copper-glow) 0%, transparent 55%),
    radial-gradient(circle at 60% 55%, var(--teal-glow) 0%, transparent 55%);
  filter: blur(20px);
  pointer-events: none;
}
/* 抽象雕塑剪影：铜色与松石绿交织 */
.hero__sculpt {
  position: absolute;
  z-index: 2;
  bottom: 0; left: 50%;
  width: min(620px, 80vw);
  height: 52vh;
  transform: translateX(-50%);
  background:
    radial-gradient(120% 80% at 30% 100%, var(--copper-glow), transparent 55%),
    radial-gradient(120% 80% at 70% 100%, var(--teal-glow), transparent 55%),
    linear-gradient(180deg, transparent, rgba(10,10,10,0.92));
  clip-path: polygon(50% 0, 64% 22%, 58% 100%, 42% 100%, 36% 22%);
  opacity: 0.85;
  pointer-events: none;
}
.hero__content { position: relative; z-index: 3; }
.hero__eyebrow {
  font-size: 11px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 28px;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(36px, 6vw, 100px);
  letter-spacing: 0.18em;
  line-height: 1.08;
  color: #ddc28c;
}
.hero__title-line {
  display: block;
  margin-left: 0.18em;
}
.hero__subtitle {
  margin-top: 26px;
  font-size: clamp(13px, 1.4vw, 16px);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__scroll {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--muted);
  text-transform: uppercase;
  animation: float 2.6s ease-in-out infinite;
}
@keyframes float { 0%,100%{ transform: translate(-50%,0);} 50%{ transform: translate(-50%,8px);} }

/* ============ 项目案例头部 ============ */
.project {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
}
.project__head { text-align: center; margin-bottom: clamp(56px, 7vw, 92px); }
.project__index {
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 16px;
}
.project__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(42px, 7vw, 84px);
  letter-spacing: 0.08em;
  line-height: 1.05;
  margin-bottom: 8px;
}
.project__subtitle {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 22px;
}
.project__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 34px;
}
.meta-dot {
  width: 4px; height: 4px;
  background: var(--teal);
  transform: rotate(45deg);
}
.project__head .rule--center { margin-top: 8px; }

/* ============ 案例网格：3 列对称 ============ */
.works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 28px);
}
.work__frame {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
}
.work__img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) brightness(0.86) contrast(1.04);
  transition: transform 1.1s cubic-bezier(.2,.8,.2,1), filter .6s ease;
}
.work:hover .work__img { transform: scale(1.05); filter: grayscale(0) brightness(0.98) contrast(1.04); }
.work__frame::after {
  content: "";
  position: absolute; inset: 0;
  box-shadow: inset 0 0 0 1px rgba(193,122,58,0);
  transition: box-shadow .5s ease;
}
.work:hover .work__frame::after { box-shadow: inset 0 0 0 1px var(--line); }

/* ============ 区块通用 ============ */
.section-head { text-align: center; margin: 0 auto clamp(48px, 7vw, 88px); }
.section-head__index {
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 16px;
}
.section-head__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(34px, 5vw, 58px);
  letter-spacing: 0.08em;
}

/* ============ 设计理念 ============ */
.philosophy {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
  text-align: left;
}
.philosophy .rule--center { margin-bottom: 52px; }
.philosophy__quote {
  font-family: var(--serif);
  font-weight: 300;
  font-style: normal;
  font-size: clamp(22px, 3vw, 38px);
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--ivory);
  max-width: 1120px;
}
.philosophy__lead {
  max-width: 1040px;
  margin: 40px 0 0;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.95;
  letter-spacing: 0.02em;
  color: var(--ivory);
  opacity: 0.86;
}
.philosophy__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: 64px;
  text-align: left;
}
.philosophy__col {
  padding-top: 22px;
  border-top: 1px solid rgba(193,122,58,0.35);
}
.philosophy__col h4 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--copper);
  margin-bottom: 14px;
}
.philosophy__col p { font-size: 14px; color: var(--muted); line-height: 1.9; }
.philosophy__scope {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1200px;
  margin: 56px 0 0;
}
.philosophy__scope span {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ivory);
  text-align: center;
  padding: 18px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color .3s ease, color .3s ease;
}
.philosophy__scope span:hover { border-color: var(--copper); color: var(--copper); }
@media (max-width: 720px) {
  .philosophy__cols { grid-template-columns: 1fr; gap: 0; }
  .philosophy__col { margin-top: 34px; }
}

/* ============ 服务流程 ============ */
.process {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
}
.process__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(18px, 2.4vw, 40px);
}
.process__item { text-align: center; }
.process__num {
  display: block;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(42px, 5vw, 60px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--copper);
  margin-bottom: 18px;
  padding-bottom: 18px;
  position: relative;
  transition: color .4s ease;
}
.process__num::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 26px;
  height: 1px;
  background: var(--line);
  transition: width .45s ease, background .45s ease;
}
.process__item:hover .process__num { color: var(--teal); }
.process__item:hover .process__num::after { width: 46px; background: var(--copper); }
.process__name {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.process__desc {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ============ 页脚 ============ */
.footer {
  text-align: center;
  padding: clamp(110px, 13vw, 180px) var(--gutter) 80px;
}
.footer .rule--center { margin-bottom: 64px; }
.footer__brand {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(40px, 8vw, 88px);
  letter-spacing: 0.18em;
  margin-left: 0.18em;
  color: transparent;
  background: linear-gradient(180deg, #fff, var(--copper));
  -webkit-background-clip: text;
  background-clip: text;
}
.footer__contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(44px, 8vw, 110px);
  margin: 64px 0 52px;
}
.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.contact-item__label {
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--copper);
}
.contact-item__value {
  font-family: var(--serif);
  font-size: clamp(18px, 2.4vw, 24px);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  color: var(--ivory);
  text-decoration: none;
  transition: color .3s ease;
}
a.contact-item__value:hover { color: var(--copper); }
.contact-item__phones {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}
.contact-item__qr {
  width: 116px;
  height: 116px;
  object-fit: cover;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px;
  background: #fff;
  border-radius: 4px;
  transition: border-color .3s ease, transform .3s ease;
}
.contact-item__qr-link {
  position: relative;
  display: inline-block;
  cursor: zoom-in;
  text-decoration: none;
}
.contact-item__qr-link:hover .contact-item__qr {
  border-color: var(--copper);
  transform: scale(1.03);
}
.contact-item__qr-hint {
  position: absolute;
  left: 50%; bottom: -20px;
  transform: translateX(-50%);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  transition: opacity .3s ease;
  white-space: nowrap;
}
.contact-item__qr-link:hover .contact-item__qr-hint { opacity: 1; }
.footer__copy {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(138,135,128,0.6);
}

/* ============ 滚动淡入 ============ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1);
}
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* 板块级进入动画：整体明显上移+淡入，强化“翻到下一板块”的切换感 */
.reveal-sec {
  opacity: 0;
  transform: translateY(76px);
  transition: opacity 1s cubic-bezier(.22,.61,.36,1), transform 1s cubic-bezier(.22,.61,.36,1);
  position: relative;
}
.reveal-sec.is-in { opacity: 1; transform: translateY(0); }
/* 铜色章节线：进入时从左向右拉开，作为清晰的“新板块”视觉提示 */
.reveal-sec::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(193,122,58,.7), transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 1s cubic-bezier(.22,.61,.36,1) .18s;
  pointer-events: none;
}
.reveal-sec.is-in::before { transform: scaleX(1); }
@media (prefers-reduced-motion: reduce) {
  /* 减弱动效下仍保留清晰但温和的上移+淡入，确保用户能看到板块切换 */
  .reveal, .reveal-sec { transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
  .reveal-sec::before { transition: transform .6s ease .1s; }
}

/* ============ 响应式：保持中轴单栏 ============ */
@media (max-width: 860px) {
  .works__grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .process__row { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
  .philosophy__cols { grid-template-columns: 1fr; text-align: center; }
  .philosophy__col { text-align: center; }
  .philosophy__scope { grid-template-columns: repeat(2, 1fr); max-width: 600px; margin: 56px auto 0; }
  .nav__links { display: none; }
  .project__meta { flex-wrap: wrap; gap: 10px 14px; }
}
@media (max-width: 480px) {
  .process__row { grid-template-columns: 1fr; max-width: 260px; margin: 0 auto; }
  .philosophy__scope { grid-template-columns: 1fr; max-width: 360px; }
}

/* ============ 项目封面卡片（作品集首页） ============ */
.projects {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
}
.projects__head { text-align: center; margin-bottom: clamp(48px, 7vw, 88px); }
.projects__head .section-head__index {
  font-size: 11px; letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--copper-soft); margin-bottom: 16px;
}
.projects__head .section-head__title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(34px, 5vw, 58px); letter-spacing: 0.08em;
}
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(24px, 4vw, 48px);
  justify-content: center;
  justify-items: center;
}
.project-card {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 2px;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  transition: border-color .5s ease;
}
.project-card:hover { border-color: rgba(193,122,58,0.32); }
.project-card__img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) brightness(0.8) contrast(1.04);
  transition: transform 1.1s cubic-bezier(.2,.8,.2,1), filter .6s ease;
}
.project-card:hover .project-card__img { transform: scale(1.06); filter: grayscale(0) brightness(0.96); }
.project-card__overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  justify-content: space-between;
  padding: clamp(16px, 2.2vw, 28px);
  background: linear-gradient(180deg, rgba(10,10,10,0.10) 0%, rgba(10,10,10,0) 38%, rgba(10,10,10,0.62) 100%);
  transition: background .55s ease;
}
.project-card:hover .project-card__overlay {
  background: linear-gradient(180deg, rgba(10,10,10,0.16) 0%, rgba(10,10,10,0) 36%, rgba(10,10,10,0.80) 100%);
}
.project-card__top {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}
.project-card__index {
  font-size: 10px; letter-spacing: 0.34em; text-transform: uppercase;
  color: var(--copper);
}
.project-card__cta {
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase;
  color: rgba(244,241,234,0.70);
  transition: color .4s ease;
}
.project-card:hover .project-card__cta { color: var(--copper); }

.project-card__bottom {
  display: flex; flex-direction: column;
  align-items: flex-end; text-align: right;
  width: 100%;
}
.project-card__title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(18px, 2.1vw, 26px); letter-spacing: 0.05em; line-height: 1.18;
  color: var(--ivory);
  position: relative; padding-bottom: 8px;
}
.project-card__title::after {
  content: ""; position: absolute; right: 0; bottom: 0;
  width: 0; height: 1px; background: var(--copper);
  transition: width .55s cubic-bezier(.2,.8,.2,1);
}
.project-card:hover .project-card__title::after { width: 100%; }
.project-card__sub {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(10px, 1.1vw, 12px); letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--copper); opacity: 0.88; margin-top: 12px;
}

/* ============ 返回链接 ============ */
.back-link {
  display: inline-block;
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 28px;
  transition: color .3s ease;
}
.back-link:hover { color: var(--copper); }

@media (max-width: 860px) {
  .projects__grid { grid-template-columns: 1fr; }
}

/* ============ 项目设计说明（editorial 引言） ============ */
.project__statement {
  max-width: 780px;
  margin: 0 auto clamp(72px, 10vw, 120px);
  padding: 0 24px;
  text-align: center;
}
.project__statement::before {
  content: "";
  display: block;
  width: 36px;
  height: 1px;
  background: var(--copper);
  opacity: 0.7;
  margin: 0 auto 36px;
}
.project__statement p {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.75;
  letter-spacing: 0.05em;
  color: var(--ivory);
  opacity: 0.88;
  margin: 0;
}
.project__statement::after {
  content: "";
  display: block;
  width: 36px;
  height: 1px;
  background: var(--copper);
  opacity: 0.7;
  margin: 36px auto 0;
}

/* ============ 案例图灯箱（点击放大全屏，纯 CSS :target） ============ */
.work__thumb {
  display: block;
  position: relative;
  text-decoration: none;
  color: inherit;
  outline: none;
}
.work__frame { cursor: zoom-in; }
/* 放大提示角标 */
.work__thumb::after {
  content: "⤢";
  position: absolute; top: 14px; right: 14px;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; line-height: 1;
  color: var(--ivory);
  background: rgba(10, 10, 10, 0.4);
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: 0; transform: scale(.85);
  transition: opacity .4s ease, transform .4s ease;
  backdrop-filter: blur(4px);
  pointer-events: none;
}
.work__thumb:hover::after { opacity: 1; transform: scale(1); }

/* 灯箱遮罩（默认纯 CSS :target 驱动；JS 可用时由 .is-open 接管，见 script.js） */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  padding: clamp(20px, 5vw, 72px);
  padding-top: max(clamp(20px, 5vw, 72px), env(safe-area-inset-top));
  padding-bottom: max(clamp(20px, 5vw, 72px), env(safe-area-inset-bottom));
  background: rgba(8, 8, 8, 0.94);
  backdrop-filter: blur(8px);
  opacity: 0; visibility: hidden;
  transition: opacity .45s ease, visibility .45s ease;
  overscroll-behavior: contain;
}
/* 无 JS 兜底：靠 :target 打开 */
.lightbox:target { opacity: 1; visibility: visible; }
/* JS 接管后（html.js-lb）改由 .is-open 控制，避免 :target 触发页面跳滚 */
html.js-lb .lightbox:target { opacity: 0; visibility: hidden; }
html.js-lb .lightbox.is-open { opacity: 1; visibility: visible; }

/* 灯箱打开时锁定背景滚动（移动端关键：防止滑动把页面滚走 / fixed 错位） */
html.lb-lock, html.lb-lock body {
  overflow: hidden !important;
  overscroll-behavior: none;
}
html.lb-lock body {
  position: fixed;
  left: 0; right: 0; width: 100%;
}

/* 背景点空白处关闭 */
.lightbox__backdrop {
  position: absolute; inset: 0; z-index: 0;
  text-decoration: none;
}
/* 按钮/链接去默认样式 */
.lightbox__close, .lightbox__nav { text-decoration: none; }

.lightbox__stage {
  position: relative; z-index: 1;
  max-width: 100%; max-height: 100%;
  display: flex; align-items: center; justify-content: center;
}
.lightbox__img {
  max-width: 100%; max-height: calc(100vh - clamp(40px, 10vw, 144px));
  max-height: calc(100dvh - clamp(40px, 10vw, 144px));
  width: auto; height: auto;
  object-fit: contain;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
  border: 1px solid var(--line);
  transform: scale(.96); opacity: 0;
  transition: transform .45s cubic-bezier(.2,.8,.2,1), opacity .45s ease;
}
.lightbox:target .lightbox__img { transform: scale(1); opacity: 1; }
html.js-lb .lightbox:target .lightbox__img { transform: scale(.96); opacity: 0; }
html.js-lb .lightbox.is-open .lightbox__img { transform: scale(1); opacity: 1; }

/* 关闭按钮 */
.lightbox__close {
  position: absolute; z-index: 2; top: clamp(16px, 3vw, 32px); right: clamp(16px, 3vw, 32px);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 26px; font-weight: 200; line-height: 1;
  color: var(--ivory);
  background: transparent; border: 1px solid var(--line); border-radius: 50%;
  cursor: pointer; transition: color .3s ease, border-color .3s ease, transform .3s ease;
}
.lightbox__close:hover { color: var(--copper); border-color: var(--copper); transform: rotate(90deg); }

/* 左右切换 */
.lightbox__nav {
  position: absolute; z-index: 2; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ivory);
  background: transparent; border: 1px solid var(--line); border-radius: 50%;
  cursor: pointer; transition: color .3s ease, border-color .3s ease, background .3s ease;
}
.lightbox__nav:hover { color: var(--copper); border-color: var(--copper); background: rgba(193,122,58,.08); }
.lightbox__nav--prev { left: clamp(12px, 3vw, 32px); }
.lightbox__nav--next { right: clamp(12px, 3vw, 32px); }
.lightbox__nav span { font-size: 22px; line-height: 1; }

/* 计数器 */
.lightbox__counter {
  position: absolute; z-index: 2; bottom: clamp(16px, 3vw, 32px); left: 50%; transform: translateX(-50%);
  font-family: var(--serif); font-size: 14px; letter-spacing: 0.28em;
  color: var(--ivory); opacity: 0.7;
}

@media (max-width: 560px) {
  .lightbox__nav {
    width: 46px; height: 46px;
    background: rgba(0, 0, 0, 0.45);
    border-color: rgba(240, 237, 230, 0.32);
  }
  .lightbox__nav--prev { left: 8px; }
  .lightbox__nav--next { right: 8px; }
  /* 关闭按钮：加大触摸区 + 加底色，避免在深色图片上看不见、点不着 */
  .lightbox__close {
    width: 50px; height: 50px;
    top: max(12px, env(safe-area-inset-top));
    right: 12px;
    font-size: 30px;
    background: rgba(0, 0, 0, 0.5);
    border-color: rgba(240, 237, 230, 0.36);
  }
  .lightbox__counter { bottom: max(14px, env(safe-area-inset-bottom)); }
  /* 移动端提示：下滑或点空白处即可关闭 */
  .lightbox__hint {
    position: absolute; z-index: 2;
    bottom: calc(max(14px, env(safe-area-inset-bottom)) + 26px);
    left: 50%; transform: translateX(-50%);
    font-family: var(--sans); font-size: 11px; letter-spacing: 0.16em;
    color: var(--ivory); opacity: 0.42; white-space: nowrap;
  }
}
.lightbox__hint { display: none; }
@media (max-width: 560px) { .lightbox__hint { display: block; } }

/* ============ 按钮（通用） ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 16px 38px;
  border-radius: 2px;
  border: 1px solid var(--line);
  transition: background .4s ease, color .4s ease, border-color .4s ease, transform .4s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary { background: var(--copper); color: #0a0a0a; border-color: var(--copper); }
.btn--primary:hover { background: #d68f4c; border-color: #d68f4c; }
.btn--ghost { background: transparent; color: var(--ivory); }
.btn--ghost:hover { border-color: var(--copper); color: var(--copper); }

/* ============ 首屏：代表作背景图 + 双 CTA ============ */
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(0.92) brightness(0.52) contrast(1.05);
}
.hero__veil {
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(120% 80% at 50% 28%, rgba(10,10,10,0.30), rgba(10,10,10,0.82) 72%),
    linear-gradient(180deg, rgba(10,10,10,0.55) 0%, rgba(10,10,10,0.28) 38%, rgba(10,10,10,0.94) 100%);
}
.hero__identity {
  margin-top: 18px;
  font-family: var(--sans);
  font-size: clamp(12px, 1.4vw, 15px);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__cta-row {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
  margin-top: 44px;
}

/* ============ 代表作品：编辑式布局 ============ */
.rep {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
}
.rep__head { text-align: center; margin-bottom: clamp(48px, 7vw, 88px); }
.rep__head .section-head__index {
  font-size: 11px; letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--copper-soft); margin-bottom: 16px;
}
.rep__head .section-head__title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(34px, 5vw, 58px); letter-spacing: 0.08em;
}
.rep__list { display: flex; flex-direction: column; gap: clamp(56px, 8vw, 110px); }
.rep-item {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
}
.rep-item:nth-child(even) .rep-item__media { order: 2; }
.rep-item:nth-child(even) .rep-item__body { order: 1; text-align: right; }
.rep-item__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 2px;
}
.rep-item__img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.12) brightness(0.82) contrast(1.04);
  transition: transform 1.1s cubic-bezier(.2,.8,.2,1), filter .6s ease;
}
.rep-item:hover .rep-item__img { transform: scale(1.05); filter: grayscale(0) brightness(0.98); }
.rep-item__index {
  font-size: 11px; letter-spacing: 0.34em; text-transform: uppercase;
  color: var(--copper); margin-bottom: 14px;
}
.rep-item__title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(28px, 3.6vw, 46px); letter-spacing: 0.05em; line-height: 1.12;
  color: var(--ivory);
}
.rep-item__sub {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(12px, 1.3vw, 15px); letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--copper); opacity: 0.9; margin-top: 12px;
}
.rep-item__note {
  max-width: 460px;
  margin: 24px 0 22px;
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(15px, 1.7vw, 18px); line-height: 1.85; letter-spacing: 0.02em;
  color: var(--muted);
}
.rep-item:nth-child(even) .rep-item__note { margin-left: auto; }
.rep-item__cta {
  display: inline-block;
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--copper);
  position: relative; padding-bottom: 6px;
}
.rep-item__cta::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 28px; height: 1px; background: var(--copper);
  transition: width .5s cubic-bezier(.2,.8,.2,1);
}
.rep-item:hover .rep-item__cta::after { width: 100%; }
.rep-item:nth-child(even) .rep-item__cta::after { left: auto; right: 0; }

/* ============ 设计方法 ============ */
.method {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 160px) var(--gutter);
}
.method__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 56px);
}
.method__col {
  padding-top: 26px;
  border-top: 1px solid rgba(193,122,58,0.35);
}
.method__no {
  display: block;
  font-family: var(--serif); font-weight: 300;
  font-size: 40px; letter-spacing: 0.04em; line-height: 1;
  color: rgba(193,122,58,0.28);
  margin-bottom: 18px;
}
.method__name {
  font-family: var(--serif); font-weight: 400;
  font-size: 24px; letter-spacing: 0.08em; color: var(--copper);
  margin-bottom: 16px;
}
.method__desc { font-size: 14px; color: var(--muted); line-height: 1.95; }

/* ============ 页脚：联系 CTA ============ */
.footer__cta { text-align: center; margin-bottom: clamp(40px, 6vw, 72px); }
.footer__cta-title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(34px, 6vw, 64px); letter-spacing: 0.08em;
  color: var(--ivory);
}
.footer__cta-sub {
  font-size: 13px; letter-spacing: 0.16em; color: var(--muted);
  margin: 18px 0 32px;
}
.footer__cta-row {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
}

/* ============ 右下角固定微信咨询入口 ============ */
.wechat-fab {
  position: fixed;
  right: clamp(16px, 3vw, 34px);
  bottom: clamp(16px, 3vw, 34px);
  z-index: 45;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px 13px 16px;
  background: var(--copper);
  color: #0a0a0a;
  border-radius: 999px;
  box-shadow: 0 14px 40px rgba(193,122,58,0.32);
  transition: transform .35s cubic-bezier(.2,.8,.2,1), background .35s ease, box-shadow .35s ease;
}
.wechat-fab:hover { transform: translateY(-3px); background: #d68f4c; box-shadow: 0 18px 48px rgba(193,122,58,0.42); }
.wechat-fab svg { width: 24px; height: 24px; }
.wechat-fab__label {
  font-family: var(--sans);
  font-size: 13px; letter-spacing: 0.16em; font-weight: 500;
  white-space: nowrap;
}

/* ============ 新增区块响应式 ============ */
@media (max-width: 860px) {
  .rep-item { grid-template-columns: 1fr; gap: 26px; }
  .rep-item:nth-child(even) .rep-item__media { order: 0; }
  .rep-item:nth-child(even) .rep-item__body { order: 0; text-align: left; }
  .rep-item:nth-child(even) .rep-item__note { margin-left: 0; }
  .method__cols { grid-template-columns: 1fr; gap: 0; }
  .method__col { margin-top: 34px; }
  .process__row { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
}
@media (max-width: 480px) {
  .hero__cta-row .btn, .footer__cta-row .btn { flex: 1 1 auto; }
  .wechat-fab__label { display: none; }
  .wechat-fab { padding: 14px; }
  .process__row { grid-template-columns: 1fr; max-width: 260px; margin: 0 auto; }
}

/* ============ 项目详情：背景 / 策略 ============ */
.project-about {
  max-width: 980px;
  margin: 0 auto clamp(64px, 9vw, 110px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 64px);
}
.project-about__col { padding-top: 22px; border-top: 1px solid rgba(193,122,58,0.35); }
.project-about__title {
  font-family: var(--serif); font-weight: 400;
  font-size: 20px; letter-spacing: 0.1em; color: var(--copper); margin-bottom: 14px;
}
.project-about__text { font-size: 14px; color: var(--muted); line-height: 1.95; }
@media (max-width: 720px) {
  .project-about { grid-template-columns: 1fr; gap: 0; }
  .project-about__col { margin-top: 30px; }
}

/* ============ 项目详情：下一项目 + 咨询入口 ============ */
.project-next {
  max-width: var(--maxw);
  margin: clamp(70px, 10vw, 130px) auto 0;
  padding: clamp(40px, 6vw, 64px) var(--gutter) 0;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.project-next__link { display: flex; flex-direction: column; gap: 10px; }
.project-next__label {
  font-size: 11px; letter-spacing: 0.34em; text-transform: uppercase; color: var(--copper-soft);
}
.project-next__title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(24px, 3.4vw, 40px); letter-spacing: 0.05em; color: var(--ivory);
  transition: color .3s ease;
}
.project-next__link:hover .project-next__title { color: var(--copper); }
@media (max-width: 560px) {
  .project-next { flex-direction: column; align-items: flex-start; gap: 24px; }
  .project-next__cta { width: 100%; }
}