/* ============================================================
   陈屿 · 品牌视觉设计工作室 — 编辑排版风格设计系统
   纸白 / 墨黑 / 朱红 — 本地字体零外链
   ============================================================ */

@font-face {
  font-family: "Newsreader";
  src: url("../assets/fonts/newsreader-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("../assets/fonts/newsreader-500-normal.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("../assets/fonts/newsreader-400-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../assets/fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../assets/fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #faf9f5;
  --paper-deep: #f2efe8;
  --ink: #1a1a18;
  --ink-soft: #4a4842;
  --ink-faint: #8a867c;
  --red: #d43d2a;
  --line: rgba(26, 26, 24, 0.14);
  --line-strong: rgba(26, 26, 24, 0.55);

  --serif: "Newsreader", "Songti SC", "STSong", "SimSun", serif;
  --mono: "Plex Mono", "PingFang SC", "Hiragino Sans GB", monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --gutter: clamp(20px, 4vw, 64px);
  --max: 1480px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}

::selection { background: var(--red); color: var(--paper); }

img { display: block; width: 100%; height: 100%; object-fit: cover; }

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

ul { list-style: none; }

/* ---------- 通用工具 ---------- */

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.mono {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.mono--red { color: var(--red); }

.serif { font-family: var(--serif); }

.hairline-top { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0 14px;
  border-top: 1px solid var(--line-strong);
}

.section-head .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(30px, 4.4vw, 60px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

/* 进场动效 */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition-duration: 0.01ms !important; }
}

/* ---------- 顶部导航 ---------- */

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background 0.4s;
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand svg { width: 34px; height: 34px; flex: none; }

.brand-name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: 0.02em;
}

.brand-name em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  line-height: 1.3;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 44px);
}

.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  padding: 6px 0;
  position: relative;
  transition: color 0.25s;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); transform-origin: left; }
.nav-links a.active { color: var(--ink); }

.nav-cta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--paper);
  background: var(--ink);
  padding: 10px 20px;
  border-radius: 999px;
  transition: background 0.25s, transform 0.25s;
}
.nav-cta:hover { background: var(--red); transform: translateY(-1px); }

/* 移动端菜单 */
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--ink);
  margin: 6px 0;
  transition: transform 0.3s, opacity 0.3s;
}

@media (max-width: 820px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  body.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  body.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  .mobile-menu {
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--paper);
    z-index: 99;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: var(--gutter);
    transform: translateY(-110%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }
  body.menu-open .mobile-menu { transform: translateY(0); }
  .mobile-menu a {
    font-family: var(--serif);
    font-size: clamp(34px, 9vw, 52px);
    font-weight: 500;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: baseline;
    gap: 16px;
  }
  .mobile-menu a .mono { font-size: 11px; }
  .mobile-menu a.active { color: var(--red); }
}

@media (min-width: 821px) { .mobile-menu { display: none; } }

main { padding-top: 68px; }

/* ---------- 首页 HERO ---------- */

.hero {
  padding: clamp(56px, 9vh, 120px) 0 0;
  position: relative;
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 14px;
}

.hero-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(44px, 9.2vw, 148px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  padding: clamp(24px, 4vw, 48px) 0 clamp(28px, 4vw, 56px);
}

.hero-title .indent { padding-left: clamp(40px, 12vw, 220px); display: block; }
.hero-title em {
  font-style: italic;
  color: var(--red);
}

.hero-title .dot {
  display: inline-block;
  width: 0.16em; height: 0.16em;
  background: var(--red);
  border-radius: 50%;
  margin-left: 0.08em;
  vertical-align: baseline;
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.6); opacity: 0.55; }
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(260px, 3fr) minmax(320px, 7fr);
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(32px, 4vw, 56px);
  align-items: end;
}

.hero-lead p {
  font-size: clamp(15px, 1.25vw, 18px);
  color: var(--ink-soft);
  max-width: 34ch;
  margin-bottom: 28px;
}

.hero-lead .btn { margin-top: 4px; }

.hero-fig {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--paper-deep);
}

.hero-fig img { transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1); }
.hero-fig:hover img { transform: scale(1.035); }

.hero-fig figcaption {
  display: none;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.hero-meta div {
  padding: 20px clamp(8px, 2vw, 28px) 24px 0;
  border-right: 1px solid var(--line);
}

.hero-meta div:last-child { border-right: 0; }
.hero-meta .mono { display: block; margin-bottom: 6px; }
.hero-meta strong {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(26px, 2.6vw, 40px);
  line-height: 1.1;
}
.hero-meta strong i { font-style: normal; color: var(--red); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .hero-meta { grid-template-columns: 1fr; }
  .hero-meta div { border-right: 0; border-bottom: 1px solid var(--line); display: flex; align-items: baseline; gap: 14px; }
  .hero-meta div:last-child { border-bottom: 0; }
  .hero-meta .mono { margin-bottom: 0; min-width: 110px; }
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 14px 26px;
  border-radius: 999px;
  transition: background 0.25s, color 0.25s, transform 0.25s;
  cursor: pointer;
  background: transparent;
}

.btn svg { width: 14px; height: 14px; transition: transform 0.3s; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:hover svg { transform: translateX(4px); }

.btn--ghost { border-color: var(--line-strong); }

/* ---------- 作品网格（首页精选 + 作品页） ---------- */

.works { padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 120px); }

.work-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(20px, 3vw, 48px) clamp(16px, 2.4vw, 36px);
  padding-top: clamp(24px, 3.5vw, 48px);
}

.work-card { grid-column: span 6; }
.work-card--wide { grid-column: span 7; }
.work-card--narrow { grid-column: span 5; }
.work-card--full { grid-column: span 12; }

.work-card a { display: block; }

.work-thumb {
  overflow: hidden;
  background: var(--paper-deep);
  position: relative;
}

.work-thumb::after {
  content: "VIEW — 查看项目";
  position: absolute;
  inset: auto 0 0 0;
  padding: 14px 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--paper);
  background: linear-gradient(transparent, rgba(26, 26, 24, 0.72));
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s, transform 0.35s;
}

.work-card:hover .work-thumb::after { opacity: 1; transform: none; }
.work-thumb--static::after { display: none; }

.work-thumb img {
  transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1), filter 1s;
}
.work-card:hover .work-thumb img { transform: scale(1.045); }

.ratio-32 { aspect-ratio: 3 / 2; }
.ratio-43 { aspect-ratio: 4 / 3; }
.ratio-11 { aspect-ratio: 1 / 1; }
.ratio-34 { aspect-ratio: 3 / 4; }
.ratio-169 { aspect-ratio: 16 / 9; }

.work-info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-top: 14px;
}

.work-info h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(19px, 1.7vw, 26px);
  line-height: 1.25;
}

.work-info .mono { white-space: nowrap; flex: none; }

.work-info .cat { color: var(--ink-faint); }

.work-idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
  display: block;
  padding-top: 10px;
}

@media (max-width: 760px) {
  .work-card, .work-card--wide, .work-card--narrow { grid-column: span 12; }
}

/* ---------- 作品页筛选 ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0 8px;
}

.filter-btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 9px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.25s;
}

.filter-btn:hover { border-color: var(--ink); color: var(--ink); }
.filter-btn.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.work-card.hidden-item { display: none; }

.page-head {
  padding: clamp(48px, 8vw, 100px) 0 0;
}

.page-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(52px, 10vw, 132px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  padding: clamp(20px, 3vw, 40px) 0 clamp(20px, 3vw, 36px);
  border-top: 1px solid var(--line-strong);
  margin-top: 12px;
}

.page-title em { font-style: italic; color: var(--red); }

.page-sub {
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.25vw, 18px);
}

/* ---------- 跑马灯分隔 ---------- */

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 16px 0;
}

.marquee-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 26s linear infinite;
}

.marquee-track span {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(18px, 2vw, 26px);
  color: var(--ink-soft);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 48px;
}

.marquee-track span::after {
  content: "";
  width: 8px; height: 8px;
  background: var(--red);
  border-radius: 50%;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---------- 服务速览（首页） ---------- */

.services { padding: clamp(48px, 7vw, 96px) 0; }

.service-list { border-bottom: 1px solid var(--line); }

.service-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: clamp(16px, 3vw, 48px);
  align-items: baseline;
  padding: clamp(22px, 3vw, 36px) 0;
  border-top: 1px solid var(--line);
  transition: padding-left 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.service-row:hover { padding-left: 20px; }

.service-row .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.service-row h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.2;
  margin-bottom: 8px;
}

.service-row p { color: var(--ink-soft); max-width: 56ch; font-size: 15px; }

.service-row .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 760px) {
  .service-row { grid-template-columns: 44px 1fr; }
  .service-row .tag { display: none; }
}

/* ---------- 首页关于节选 ---------- */

.about-teaser {
  display: grid;
  grid-template-columns: minmax(280px, 4fr) minmax(320px, 5fr);
  gap: clamp(24px, 4vw, 72px);
  padding: clamp(48px, 7vw, 96px) 0;
  align-items: center;
}

.about-teaser .fig {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-deep);
}

.about-teaser .fig img { transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1); }
.about-teaser .fig:hover img { transform: scale(1.03); }

.about-teaser blockquote {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(24px, 2.6vw, 38px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin: 18px 0 24px;
}

.about-teaser p { color: var(--ink-soft); max-width: 46ch; margin-bottom: 28px; }

@media (max-width: 900px) { .about-teaser { grid-template-columns: 1fr; } }

/* ---------- 关于页 ---------- */

.about-hero {
  display: grid;
  grid-template-columns: minmax(300px, 5fr) minmax(300px, 4fr);
  gap: clamp(24px, 4vw, 72px);
  padding: clamp(40px, 6vw, 80px) 0 clamp(48px, 6vw, 80px);
  align-items: start;
}

.about-hero .portrait {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--paper-deep);
}

.about-hero .bio p { margin-bottom: 18px; color: var(--ink-soft); }
.about-hero .bio p strong { color: var(--ink); font-weight: 600; }

.bio-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  margin: 28px 0;
}

.bio-stats div { padding: 18px 12px 18px 0; border-right: 1px solid var(--line); }
.bio-stats div:last-child { border-right: 0; }
.bio-stats strong {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(24px, 2.4vw, 36px);
  display: block;
  line-height: 1.15;
}
.bio-stats strong i { font-style: normal; color: var(--red); }
.bio-stats .mono { margin-top: 4px; display: block; }

@media (max-width: 900px) { .about-hero { grid-template-columns: 1fr; } }

/* 履历时间线 */
.timeline { padding: clamp(40px, 6vw, 80px) 0; }

.tl-row {
  display: grid;
  grid-template-columns: 140px 1fr 2fr;
  gap: clamp(16px, 3vw, 48px);
  padding: 22px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}

.tl-row .year {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--red);
}

.tl-row h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(18px, 1.8vw, 24px);
  line-height: 1.3;
}

.tl-row p { color: var(--ink-soft); font-size: 15px; }

@media (max-width: 760px) {
  .tl-row { grid-template-columns: 90px 1fr; }
  .tl-row p { grid-column: 2; }
}

/* 技能矩阵 */
.skill-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
  margin-top: 32px;
}

.skill-cell {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 26px 22px 30px;
  transition: background 0.3s;
}

.skill-cell:hover { background: var(--paper-deep); }

.skill-cell .mono { display: block; margin-bottom: 10px; color: var(--red); }
.skill-cell h4 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  margin-bottom: 8px;
}
.skill-cell p { font-size: 13.5px; color: var(--ink-soft); line-height: 1.7; }

@media (max-width: 900px) { .skill-matrix { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .skill-matrix { grid-template-columns: 1fr; } }

/* 获奖列表 */
.honor-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.honor-row h4 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(17px, 1.6vw, 22px);
}

.honor-row .mono { text-align: right; white-space: nowrap; }

@media (max-width: 640px) {
  .honor-row { flex-direction: column; gap: 4px; }
  .honor-row .mono { text-align: left; }
}

.studio-fig {
  margin: clamp(40px, 6vw, 72px) 0 0;
  overflow: hidden;
  background: var(--paper-deep);
}
.studio-fig { aspect-ratio: 21 / 9; }
.studio-fig img { transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1); }
.studio-fig:hover img { transform: scale(1.025); }

/* ---------- 服务页 ---------- */

.svc-detail { border-bottom: 1px solid var(--line); }

.svc-block {
  display: grid;
  grid-template-columns: 120px 1fr 1fr;
  gap: clamp(20px, 3.5vw, 64px);
  padding: clamp(32px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
  align-items: start;
}

.svc-block .num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--red);
  position: sticky;
  top: 100px;
}

.svc-block h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.svc-block .desc { color: var(--ink-soft); max-width: 46ch; }

.svc-block ul li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

.svc-block ul li:last-child { border-bottom: 0; }
.svc-block ul li .mono { white-space: nowrap; }

@media (max-width: 900px) {
  .svc-block { grid-template-columns: 1fr; }
  .svc-block .num { position: static; }
}

/* 流程步骤 */
.flow-steps {
  counter-reset: step;
  border-bottom: 1px solid var(--line);
}

.flow-step {
  display: grid;
  grid-template-columns: 100px 1fr 1.2fr;
  gap: clamp(16px, 3vw, 48px);
  padding: 28px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
  transition: background 0.3s;
}

.flow-step:hover { background: var(--paper-deep); }

.flow-step .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(28px, 3vw, 44px);
  color: var(--red);
  line-height: 1;
}

.flow-step h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(19px, 2vw, 27px);
}

.flow-step p { color: var(--ink-soft); font-size: 15px; }

@media (max-width: 760px) {
  .flow-step { grid-template-columns: 64px 1fr; }
  .flow-step p { grid-column: 2; }
}

/* 合作说明双栏 */
.collab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 72px);
  padding: clamp(40px, 6vw, 80px) 0;
}

.collab-grid h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(22px, 2.4vw, 32px);
  margin-bottom: 16px;
}

.collab-grid p { color: var(--ink-soft); margin-bottom: 14px; }

@media (max-width: 820px) { .collab-grid { grid-template-columns: 1fr; } }

/* ---------- 联系 CTA 带 ---------- */

.contact-band {
  border-top: 1px solid var(--line-strong);
  padding: clamp(56px, 9vw, 130px) 0;
  text-align: center;
}

.contact-band .mono { display: block; margin-bottom: 18px; }

.contact-band h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(36px, 6vw, 84px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: 28px;
}

.contact-band h2 em { font-style: italic; color: var(--red); }

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 40px;
  margin-top: 8px;
}

.contact-lines a {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: color 0.25s, border-color 0.25s;
}

.contact-lines a:hover { color: var(--red); border-color: var(--red); }

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--line-strong);
  background: var(--ink);
  color: var(--paper);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(32px, 4vw, 56px);
}

.footer-grid h5 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(250, 249, 245, 0.5);
  margin-bottom: 14px;
  font-weight: 400;
}

.footer-grid a, .footer-grid p {
  display: block;
  color: rgba(250, 249, 245, 0.82);
  font-size: 14px;
  padding: 4px 0;
  transition: color 0.25s;
}

.footer-grid a:hover { color: var(--red); }

.footer-brand .brand-name { color: var(--paper); font-size: 22px; }
.footer-brand .brand-name em { color: rgba(250, 249, 245, 0.5); }
.footer-brand svg { width: 40px; height: 40px; margin-bottom: 14px; }
.footer-brand p { max-width: 30ch; color: rgba(250, 249, 245, 0.6); font-size: 13.5px; }

.footer-bottom {
  border-top: 1px solid rgba(250, 249, 245, 0.14);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(250, 249, 245, 0.45);
}

@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }