/* 婚礼网站 · 共享外壳：变量 / 导航 / 占位框 / 按钮 / 版块骨架 / 页脚 */
:root {
  --paper: #fbf7ee;
  --paper-warm: #f5eee1;
  --paper-deep: #efe5d2;
  --gold: #b8943f;
  --gold-bright: #d4b56a;
  --gold-line: rgba(184, 148, 63, 0.26);
  --ink: #2a2216;
  --ink-soft: rgba(42, 34, 22, 0.66);
  --ink-faint: rgba(42, 34, 22, 0.38);
  --foil: linear-gradient(115deg, #8f6f2a 0%, #d8bc74 28%, #f0e2b8 48%, #c9a84c 68%, #8f6f2a 100%);
  /* 标题与正文用衬线，界面文字（导航、按钮、标签）用黑体，中文才立得住 */
  --serif: "Cormorant Garamond", "Noto Serif SC", "Source Han Serif SC",
    "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Hiragino Sans GB",
    "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --label: "Cinzel", "Cormorant Garamond", Georgia, serif;
  --shell: min(100% - 2.5rem, 72rem);
  --shell-narrow: min(100% - 2.5rem, 46rem);
  --nav-h: 4.5rem;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.is-booting {
  overflow: hidden;
}

img,
video {
  display: block;
  max-width: 100%;
}

::selection {
  background: rgba(184, 148, 63, 0.24);
}

/* 跨页切换：支持的浏览器里做淡入淡出 */
@view-transition {
  navigation: auto;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none !important;
  opacity: 0.16;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

.frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 55% at 50% 40%, rgba(216, 188, 116, 0.18), transparent 65%),
    linear-gradient(160deg, #efe5d2 0%, #f7f1e6 60%, #e9dcc4 100%);
  border: 1px solid var(--gold-line);
}

.frame.plain { border: 0; }
.frame.portrait { aspect-ratio: 3 / 4; }
.frame.square { aspect-ratio: 1 / 1; }
.frame.wide { aspect-ratio: 4 / 3; }
.frame.pano { aspect-ratio: 16 / 9; }
.frame.ratio-4x3 { aspect-ratio: 4 / 3; }
.frame.ratio-3x2 { aspect-ratio: 3 / 2; }
.frame.ratio-2x3 { aspect-ratio: 2 / 3; }
.frame.ratio-8x9 { aspect-ratio: 3840 / 4316; }

.frame > img,
.frame > video {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame.has-media > img,
.frame.has-media > video { display: block; }
.frame.has-media .frame-note { display: none; }

.frame-note {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 0.45rem;
  text-align: center;
  padding: 1rem;
  pointer-events: none;
}

.frame-note b {
  font-family: var(--label);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
}

.frame-note i {
  font-size: 0.86rem;
  color: var(--ink-faint);
}

.frame.on-dark {
  border: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 35%, rgba(216, 188, 116, 0.22), transparent 65%),
    linear-gradient(160deg, #3a3226 0%, #1c1812 55%, #2a2216 100%);
}

.frame.on-dark .frame-note b { color: rgba(232, 211, 176, 0.72); }
.frame.on-dark .frame-note i { color: rgba(232, 211, 176, 0.4); }

/* 图片缓缓浮现 */
.frame > img,
.frame > video {
  animation: media-in 1.1s var(--ease) both;
}

@keyframes media-in {
  from { opacity: 0; transform: scale(1.04); }
  to { opacity: 1; transform: none; }
}

/* —— 顶栏 —— */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.45s var(--ease), border-color 0.45s var(--ease);
}

.nav-inner {
  width: var(--shell);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-mark {
  font-size: 1.08rem;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}

.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  position: relative;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 0.3rem;
  transition: color 0.3s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"],
.nav-links a.is-active { color: var(--ink); }

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after,
.nav-links a.is-active::after { transform: scaleX(1); }

.nav-cta {
  font-family: var(--sans);
  font-size: 0.84rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid rgba(184, 148, 63, 0.5);
  padding: 0.55rem 1.15rem;
  white-space: nowrap;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.nav-cta:hover {
  background: linear-gradient(120deg, #b8943f, #d4b56a);
  border-color: transparent;
  color: #fffaf0;
}

.nav-scrim {
  display: none;
}

.nav-toggle {
  display: none;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid rgba(184, 148, 63, 0.55);
  background: rgba(251, 247, 238, 0.72);
  cursor: pointer;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 50%;
  width: 1.15rem;
  height: 1.5px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}

.nav-toggle span {
  top: 50%;
  margin-top: -0.5px;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  left: 0;
  transform: none;
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* 滚动后加毛玻璃与分隔线 */
.nav.is-solid {
  background: rgba(251, 247, 238, 0.9);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--gold-line);
}

/* —— 按钮 —— */
.btn {
  appearance: none;
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.8rem 1.6rem;
  border: 1px solid rgba(184, 148, 63, 0.55);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, #b8943f, #d4b56a);
  transform: translateY(101%);
  transition: transform 0.4s var(--ease);
}

.btn > span {
  position: relative;
  z-index: 1;
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    color: #fffaf0;
    border-color: transparent;
  }

  .btn:hover::before { transform: none; }

  .btn.solid:hover::before { background: linear-gradient(120deg, #a58234, #c7a55c); }
}

.btn.solid {
  color: #fffaf0;
  border-color: transparent;
}

.btn.solid::before { transform: none; }

.btn.on-dark {
  border-color: rgba(246, 240, 228, 0.5);
  color: #f6f0e4;
}

.btn.is-empty { animation: nudge 0.4s var(--ease); }

@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* —— 装饰 —— */
/* eyebrow 只放拉丁词，中文标签用 kicker */
.eyebrow {
  font-family: var(--label);
  font-size: 0.68rem;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  text-transform: uppercase;
  color: var(--gold);
}

.kicker {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.rule {
  width: min(100%, 11rem);
  height: 1px;
  margin: 1.9rem auto;
  position: relative;
  background: linear-gradient(90deg, transparent, var(--gold-bright), transparent);
  transform: scaleX(0.2);
  opacity: 0;
  transition: transform 1.1s var(--ease), opacity 0.9s var(--ease);
}

.rule.is-in {
  transform: none;
  opacity: 1;
}

.rule::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  border: 1px solid var(--gold-bright);
  transform: translate(-50%, -50%) rotate(45deg);
}

.sprig {
  width: 2.6rem;
  height: 1px;
  margin: 0 auto 1.1rem;
  background: var(--foil);
  background-size: 200% 100%;
  animation: foil-shift 7s linear infinite;
}

@keyframes foil-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* —— 版块骨架 —— */
.section {
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  position: relative;
}

.section.tint {
  background: linear-gradient(180deg, var(--paper-warm) 0%, var(--paper) 55%, var(--paper-deep) 100%);
}

.shell { width: var(--shell); margin: 0 auto; }
.shell.narrow { width: var(--shell-narrow); }

.section-head {
  text-align: center;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head h2 {
  margin-top: 0.8rem;
  font-weight: 400;
  font-size: clamp(1.9rem, 4.4vw, 2.7rem);
  letter-spacing: 0.14em;
  text-indent: 0.14em;
}

.section-head p {
  margin: 0.9rem auto 0;
  max-width: 34rem;
  color: var(--ink-soft);
}

/* 滚动显现 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }
.reveal.d4 { transition-delay: 0.4s; }

/* —— 内页页头 —— */
.page-hero {
  padding: calc(var(--nav-h) + clamp(3rem, 7vw, 5.5rem)) 0 clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  background: linear-gradient(180deg, var(--paper-warm) 0%, var(--paper) 100%);
}

.page-hero h1 {
  margin-top: 0.85rem;
  font-weight: 400;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  letter-spacing: 0.16em;
  text-indent: 0.16em;
}

.page-hero p {
  margin: 1rem auto 0;
  max-width: 32rem;
  color: var(--ink-soft);
}

/* —— 页脚 —— */
.footer {
  border-top: 1px solid var(--gold-line);
  padding: 3rem 0 3.4rem;
  text-align: center;
  background: var(--paper-deep);
}

.footer .mark {
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
}

.footer .date {
  margin-top: 0.55rem;
  font-family: var(--label);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.footer .links {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  justify-content: center;
  font-family: var(--sans);
  font-size: 0.86rem;
}

.footer .links a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.footer .links a:hover {
  color: var(--ink);
  border-color: var(--gold);
}

/* —— 背景音乐：顶栏右上角唱片钮 —— */
.music-btn {
  flex-shrink: 0;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  border: 1px solid rgba(184, 148, 63, 0.45);
  background: rgba(251, 247, 238, 0.92);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.3s var(--ease), opacity 0.3s var(--ease);
}

.music-btn:hover {
  border-color: var(--gold);
}

.music-icon {
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  border: 1.5px solid var(--gold);
  position: relative;
  background:
    radial-gradient(circle, var(--paper) 17%, transparent 18%),
    repeating-radial-gradient(circle, rgba(184, 148, 63, 0.5) 0 1px, transparent 1px 2.4px);
}

.music-icon::before {
  content: "";
  position: absolute;
  inset: 36%;
  border-radius: 50%;
  background: var(--gold);
}

.music-btn.is-on .music-icon {
  animation: music-spin 1.6s linear infinite;
}

.music-btn.is-off .music-icon {
  opacity: 0.4;
}

.music-btn.is-off .music-icon::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  top: 50%;
  height: 1.5px;
  background: var(--gold);
  transform: rotate(-38deg);
}

@keyframes music-spin {
  to { transform: rotate(360deg); }
}

body.nav-open {
  overflow: hidden;
}

/* —— 手机端顶栏 —— */
@media (max-width: 720px) {
  :root { --nav-h: 3.85rem; }

  .nav-mark { display: none; }
  .nav-cta {
    order: 2;
    margin-left: 0;
    margin-right: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.52rem 0.9rem;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: #fffaf0;
    background: linear-gradient(120deg, #b8943f, #d4b56a);
    border-color: transparent;
    box-shadow: 0 6px 16px rgba(184, 148, 63, 0.32);
  }
  .music-btn { order: 3; margin-left: 0.4rem; }
  .nav-toggle { display: block; order: 4; margin-left: 0.4rem; }
  .nav-links { display: none; order: 5; }

  .nav-scrim {
    display: none;
    position: fixed;
    inset: 0;
    z-index: -1;
    border: 0;
    margin: 0;
    padding: 0;
    background: rgba(28, 24, 18, 0.48);
    cursor: pointer;
  }

  .nav.is-open {
    height: auto;
    align-items: flex-start;
    padding-bottom: 1.55rem;
    background: #f6efe3;
    box-shadow: 0 22px 48px rgba(42, 34, 22, 0.22);
    border-bottom: 1px solid rgba(184, 148, 63, 0.42);
  }

  .nav.is-open .nav-scrim { display: block; }

  .nav.is-open .nav-inner {
    flex-wrap: wrap;
    padding-top: 1.05rem;
  }

  .nav.is-open .nav-mark,
  .nav.is-open .nav-links a { color: var(--ink); }
  .nav.is-open .nav-toggle {
    border-color: rgba(184, 148, 63, 0.7);
    background: rgba(184, 148, 63, 0.12);
  }
  .nav.is-open .nav-toggle span { background: transparent; }

  .nav.is-open .nav-toggle span::before,
  .nav.is-open .nav-toggle span::after {
    background: var(--ink);
    top: 0;
  }

  .nav.is-open .nav-toggle span::before { transform: rotate(45deg); }
  .nav.is-open .nav-toggle span::after { transform: rotate(-45deg); }

  .nav.is-open .nav-links {
    display: grid;
    gap: 0;
    width: 100%;
    margin: 1rem 0 0;
    padding: 0.35rem 0 0;
    border-top: 1px solid rgba(184, 148, 63, 0.35);
  }

  .nav.is-open .nav-links a {
    display: block;
    font-size: 1.12rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    padding: 0.95rem 0.15rem;
    border-bottom: 1px solid rgba(184, 148, 63, 0.18);
  }

  .nav.is-open .nav-links a::after { display: none; }

  .nav.is-open .nav-cta {
    order: 6;
    width: 100%;
    margin: 1.15rem 0 0;
    padding: 1.12rem 1.4rem;
    font-size: 1.12rem;
    letter-spacing: 0.22em;
    text-indent: 0.22em;
    box-shadow: 0 12px 28px rgba(184, 148, 63, 0.4);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal,
  .rule {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .frame > img,
  .frame > video,
  .sprig,
  .music-btn.is-on .music-icon {
    animation: none;
  }
}