/* ==========================================================================
   乐界乐器官网 - 全站样式表
   设计系统：黑金·中式留白·高端乐器品牌
   ========================================================================== */

/* --- 设计令牌（CSS 变量）--- */
:root {
  /* 色彩系统 - 取自 logo 金色渐变 */
  --color-gold-1: #F5A623;
  --color-gold-2: #F8D26B;
  --color-gold-3: #FF8C42;
  --color-gold-deep: #C8841C;
  --color-ink: #1A1410;
  --color-ink-soft: #2D2620;
  --color-paper: #FAF7F2;
  --color-paper-warm: #F4EFE6;
  --color-line: #E5DDD0;
  --color-text: #2A2520;
  --color-text-soft: #6B5F52;
  --color-white: #FFFFFF;
  --color-vermilion: #C8342A; /* 朱砂点缀 */

  /* 字体 */
  --font-serif: "Noto Serif SC", "STSong", "SimSun", "Songti SC", serif;
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Playfair Display", "Noto Serif SC", serif;

  /* 字号 - 流体排版 */
  --fs-hero: clamp(2.4rem, 5vw + 1rem, 4.8rem);
  --fs-h1: clamp(2rem, 3.5vw + 1rem, 3.4rem);
  --fs-h2: clamp(1.6rem, 2.2vw + 0.8rem, 2.4rem);
  --fs-h3: clamp(1.25rem, 1.2vw + 0.7rem, 1.6rem);
  --fs-h4: clamp(1.1rem, 0.5vw + 0.9rem, 1.25rem);
  --fs-body: clamp(0.95rem, 0.3vw + 0.85rem, 1.05rem);
  --fs-small: clamp(0.8rem, 0.2vw + 0.75rem, 0.9rem);

  /* 间距 - 8px 基准 */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(26, 20, 16, 0.04), 0 1px 4px rgba(26, 20, 16, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 20, 16, 0.08), 0 2px 6px rgba(26, 20, 16, 0.04);
  --shadow-lg: 0 12px 32px rgba(26, 20, 16, 0.12), 0 4px 12px rgba(26, 20, 16, 0.06);
  --shadow-gold: 0 8px 24px rgba(245, 166, 35, 0.25);

  /* 容器 */
  --container-max: 1280px;
  --container-pad: clamp(1rem, 4vw, 3rem);

  /* 动画 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 200ms;
  --dur-base: 400ms;
  --dur-slow: 700ms;
}

/* --- 重置 --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-soft);
}

a:hover {
  color: var(--color-gold-1);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

/* --- 容器 --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* --- 排版 --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold-deep);
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: 2.2em;
}

.eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1.8em;
  height: 1px;
  background: var(--color-gold-1);
}

.section-title {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-3);
}

.section-lead {
  max-width: 640px;
  color: var(--color-text-soft);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.section {
  padding-block: var(--space-7);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-8);
  }
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 1.8em;
  font-size: var(--fs-body);
  font-weight: 500;
  border-radius: var(--radius-pill);
  transition: all var(--dur-base) var(--ease-out);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold-1) 0%, var(--color-gold-3) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(245, 166, 35, 0.4);
  color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
}

.btn-ghost:hover {
  background: var(--color-ink);
  color: var(--color-white);
}

.btn-text {
  padding: 0;
  color: var(--color-gold-deep);
  font-weight: 500;
}

.btn-text::after {
  content: "→";
  margin-left: 0.4em;
  transition: transform var(--dur-fast) var(--ease-soft);
}

.btn-text:hover::after {
  transform: translateX(4px);
}

/* --- 头部 --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
  transition: all var(--dur-base) var(--ease-soft);
}

.site-header.scrolled {
  background: rgba(250, 247, 242, 0.95);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.05em;
}

.brand-name-en {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--color-text-soft);
  margin-top: 2px;
  font-weight: 400;
}

.nav {
  display: none;
}

@media (min-width: 960px) {
  .nav {
    display: flex;
    gap: 2.2rem;
    align-items: center;
  }

  .nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-ink-soft);
    position: relative;
    padding-block: 0.5rem;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--color-gold-1);
    transition: all var(--dur-base) var(--ease-out);
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
    left: 0;
  }

  .nav-link.active {
    color: var(--color-ink);
  }
}

.header-cta {
  display: none;
}

@media (min-width: 960px) {
  .header-cta {
    display: inline-flex;
  }
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-ink);
  position: relative;
  transition: all var(--dur-base) var(--ease-soft);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--color-ink);
  transition: all var(--dur-base) var(--ease-soft);
}

.menu-toggle span::before {
  top: -7px;
}

.menu-toggle span::after {
  top: 7px;
}

.menu-toggle.active span {
  background: transparent;
}

.menu-toggle.active span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.active span::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (min-width: 960px) {
  .menu-toggle {
    display: none;
  }
}

/* --- 移动菜单 --- */
.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-paper);
  z-index: 99;
  padding: var(--space-4) var(--container-pad);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu .nav-link {
  display: block;
  padding: 1rem 0;
  font-size: 1.2rem;
  font-family: var(--font-serif);
  border-bottom: 1px solid var(--color-line);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: min(85vh, 720px);
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse at top right, rgba(245, 166, 35, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(200, 52, 42, 0.06) 0%, transparent 60%),
    linear-gradient(180deg, var(--color-paper) 0%, var(--color-paper-warm) 100%);
  overflow: hidden;
  padding-block: var(--space-6);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(200, 132, 28, 0.04) 79px, rgba(200, 132, 28, 0.04) 80px);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-7);
  }
}

.hero-title {
  font-size: var(--fs-hero);
  line-height: 1.1;
  margin-bottom: var(--space-3);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.hero-title .accent {
  background: linear-gradient(135deg, var(--color-gold-1) 0%, var(--color-gold-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
  font-family: var(--font-display);
}

.hero-sub {
  font-size: var(--fs-h4);
  color: var(--color-text-soft);
  max-width: 540px;
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  max-width: 480px;
}

.stat {
  border-left: 2px solid var(--color-gold-1);
  padding-left: 1rem;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}

.stat-num .plus {
  color: var(--color-gold-1);
}

.stat-label {
  font-size: var(--fs-small);
  color: var(--color-text-soft);
  margin-top: 0.3rem;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 480px;
  margin-inline: auto;
  width: 100%;
}

.hero-mark {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 20px 40px rgba(245, 166, 35, 0.25));
  animation: float 6s ease-in-out infinite;
}

.hero-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-orbit {
  position: absolute;
  inset: -8%;
  border: 1px dashed rgba(200, 132, 28, 0.3);
  border-radius: 50%;
  animation: spin 30s linear infinite;
}

.hero-orbit::before,
.hero-orbit::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-gold-1);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-gold-1);
}

.hero-orbit::before {
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
}

.hero-orbit::after {
  bottom: 5%;
  right: 8%;
}

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

/* --- 服务卡片 --- */
.services {
  background: var(--color-paper);
  position: relative;
}

.services-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  position: relative;
  padding: var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: all var(--dur-base) var(--ease-out);
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold-1) 0%, var(--color-gold-3) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.12) 0%, rgba(255, 140, 66, 0.08) 100%);
  border-radius: var(--radius-md);
  color: var(--color-gold-deep);
  margin-bottom: var(--space-3);
}

.service-title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-1);
}

.service-desc {
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
  line-height: 1.7;
}

.service-features {
  margin-bottom: var(--space-3);
}

.service-features li {
  font-size: var(--fs-small);
  padding: 0.4rem 0;
  color: var(--color-text-soft);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.service-features li::before {
  content: "·";
  color: var(--color-gold-1);
  font-weight: 700;
  font-size: 1.2rem;
}

/* --- 通用区段头部 --- */
.section-head {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-5);
}

@media (min-width: 720px) {
  .section-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--space-4);
  }
}

/* --- 优势区 --- */
.advantages {
  background: var(--color-ink);
  color: var(--color-paper);
  position: relative;
  overflow: hidden;
}

.advantages::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(245, 166, 35, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.advantages .section-title,
.advantages h2,
.advantages h3 {
  color: var(--color-paper);
}

.advantages .eyebrow {
  color: var(--color-gold-2);
}

.advantages .eyebrow::before {
  background: var(--color-gold-2);
}

.advantages .section-lead {
  color: rgba(250, 247, 242, 0.7);
}

.advantages-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  position: relative;
}

@media (min-width: 720px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.advantage-item {
  position: relative;
  padding-top: var(--space-3);
  border-top: 1px solid rgba(245, 166, 35, 0.3);
}

.advantage-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-gold-2) 0%, var(--color-gold-1) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.advantage-title {
  font-size: var(--fs-h4);
  margin-bottom: var(--space-1);
  color: var(--color-paper);
}

.advantage-desc {
  font-size: var(--fs-small);
  color: rgba(250, 247, 242, 0.65);
  line-height: 1.7;
}

/* --- 加盟店展示 --- */
.franchise {
  background: var(--color-paper-warm);
}

.map-wrap {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 960px) {
  .map-wrap {
    grid-template-columns: 1fr 1.2fr;
  }
}

.map-canvas {
  position: relative;
  aspect-ratio: 4/5;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: var(--space-3);
}

.map-canvas svg {
  width: 100%;
  height: 100%;
}

.map-pin {
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--color-gold-1);
  border: 2px solid var(--color-white);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(245, 166, 35, 0.5);
  transform: translate(-50%, -50%);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-soft);
  z-index: 2;
}

.map-pin::before,
.map-pin::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--color-gold-1);
  opacity: 0.4;
  animation: pulse 2s ease-out infinite;
}

.map-pin::after {
  animation-delay: 1s;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(2.5); opacity: 0; }
}

.map-pin:hover {
  transform: translate(-50%, -50%) scale(1.4);
}

.store-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  max-height: 520px;
  overflow-y: auto;
  padding-right: var(--space-2);
}

@media (min-width: 960px) {
  .store-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.store-card {
  padding: var(--space-3);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: all var(--dur-fast) var(--ease-soft);
}

.store-card:hover {
  border-color: var(--color-gold-1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.store-city {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.store-tag {
  font-size: 0.7rem;
  font-family: var(--font-sans);
  font-weight: 500;
  padding: 0.2rem 0.5rem;
  background: rgba(245, 166, 35, 0.12);
  color: var(--color-gold-deep);
  border-radius: var(--radius-pill);
}

.store-address {
  font-size: var(--fs-small);
  color: var(--color-text-soft);
  line-height: 1.6;
}

.store-meta {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-small);
  color: var(--color-text-soft);
}

.store-meta strong {
  color: var(--color-ink);
  font-weight: 600;
}

/* --- 学员认证 --- */
.certification {
  background: var(--color-paper);
}

.cert-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-4);
}

.cert-filter {
  padding: 0.5rem 1.2rem;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-text-soft);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  transition: all var(--dur-fast) var(--ease-soft);
  cursor: pointer;
}

.cert-filter:hover {
  border-color: var(--color-gold-1);
  color: var(--color-ink);
}

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

.cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .cert-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.cert-card {
  position: relative;
  background: linear-gradient(135deg, #2A2520 0%, #1A1410 100%);
  color: var(--color-paper);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3/4;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--dur-base) var(--ease-out);
}

.cert-card::before {
  content: "";
  position: absolute;
  top: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  border: 1px solid rgba(245, 166, 35, 0.4);
  border-radius: 50%;
  pointer-events: none;
}

.cert-card::after {
  content: "";
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.cert-card:hover {
  transform: translateY(-4px) rotate(-1deg);
  box-shadow: var(--shadow-lg);
}

.cert-card:hover::before {
  border-color: var(--color-gold-1);
}

.cert-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gold-1) 0%, var(--color-gold-3) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-white);
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.cert-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-paper);
  margin-top: var(--space-2);
  position: relative;
  z-index: 1;
}

.cert-level {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-gold-2);
  text-transform: uppercase;
  margin-top: 0.3rem;
  position: relative;
  z-index: 1;
}

.cert-instrument {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-style: italic;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-gold-2) 0%, var(--color-gold-1) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
  margin-top: var(--space-2);
  position: relative;
  z-index: 1;
}

.cert-meta {
  font-size: var(--fs-small);
  color: rgba(250, 247, 242, 0.6);
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-2);
}

.cert-id {
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  font-size: 0.75rem;
}

/* --- 流程 --- */
.process {
  background: var(--color-paper);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.process-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  position: relative;
}

@media (min-width: 720px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .process-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.process-step {
  text-align: center;
  position: relative;
}

.process-num {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-paper);
  border: 2px solid var(--color-gold-1);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-gold-deep);
  position: relative;
  z-index: 2;
}

.process-step::after {
  content: "";
  position: absolute;
  top: 32px;
  left: calc(50% + 40px);
  width: calc(100% - 80px);
  height: 1px;
  border-top: 1px dashed var(--color-gold-1);
  opacity: 0.4;
}

.process-step:last-child::after {
  display: none;
}

@media (max-width: 1079px) {
  .process-step::after {
    display: none;
  }
}

.process-title {
  font-size: var(--fs-h4);
  margin-bottom: 0.5rem;
}

.process-desc {
  font-size: var(--fs-small);
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* --- 联系 --- */
.contact {
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-ink-soft) 100%);
  color: var(--color-paper);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(245, 166, 35, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(200, 52, 42, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.contact .section-title,
.contact h2 {
  color: var(--color-paper);
}

.contact-wrap {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  position: relative;
}

@media (min-width: 960px) {
  .contact-wrap {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-item {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(245, 166, 35, 0.2);
}

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(245, 166, 35, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold-2);
  flex-shrink: 0;
}

.contact-label {
  font-size: var(--fs-small);
  color: rgba(250, 247, 242, 0.6);
  margin-bottom: 0.2rem;
  letter-spacing: 0.1em;
}

.contact-value {
  font-size: 1.05rem;
  color: var(--color-paper);
  font-weight: 500;
}

.contact-value a {
  color: inherit;
  text-decoration: none;
}

.contact-value a:hover {
  color: var(--color-gold-2);
  text-decoration: underline;
}

.contact-form {
  background: var(--color-white);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--color-ink);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-field {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 0.4rem;
}

.form-label::after {
  content: " *";
  color: var(--color-vermilion);
}

.form-input,
.form-select,
.form-textarea {
  font-family: inherit;
  font-size: var(--fs-body);
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  color: var(--color-ink);
  transition: all var(--dur-fast) var(--ease-soft);
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-gold-1);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  width: 100%;
  margin-top: var(--space-2);
}

.form-feedback {
  min-height: 1.25em;
  margin: 0.6rem 0 0;
  font-size: var(--fs-small);
  line-height: 1.4;
}

.form-feedback.is-error {
  color: var(--color-vermilion);
}

.form-feedback.is-success {
  color: #2f7d4a;
}

/* --- 评价 --- */
.testimonials {
  background: var(--color-paper-warm);
}

.testi-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .testi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .testi-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testi-card {
  background: var(--color-white);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  position: relative;
  border: 1px solid var(--color-line);
}

.testi-card::before {
  content: """;
  position: absolute;
  top: 0;
  right: var(--space-3);
  font-family: var(--font-display);
  font-size: 5rem;
  line-height: 1;
  color: var(--color-gold-1);
  opacity: 0.2;
}

.testi-text {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}

.testi-author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line);
}

.testi-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gold-1) 0%, var(--color-gold-3) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-family: var(--font-serif);
  font-weight: 600;
  flex-shrink: 0;
}

.testi-name {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 0.95rem;
}

.testi-role {
  font-size: var(--fs-small);
  color: var(--color-text-soft);
}

.testi-stars {
  color: var(--color-gold-1);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-1);
}

/* --- 页脚 --- */
.site-footer {
  background: var(--color-ink);
  color: rgba(250, 247, 242, 0.7);
  padding-block: var(--space-6) var(--space-3);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

.footer-col h4 {
  color: var(--color-paper);
  font-size: 1rem;
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-col a {
  color: rgba(250, 247, 242, 0.65);
  font-size: var(--fs-small);
  transition: color var(--dur-fast);
}

.footer-col a:hover {
  color: var(--color-gold-2);
}

.footer-brand p {
  font-size: var(--fs-small);
  line-height: 1.8;
  margin-top: var(--space-2);
  max-width: 320px;
}

.footer-bottom {
  border-top: 1px solid rgba(245, 166, 35, 0.15);
  padding-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--fs-small);
  color: rgba(250, 247, 242, 0.5);
}

@media (min-width: 720px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-bottom a {
  color: rgba(250, 247, 242, 0.5);
}

.footer-bottom a:hover {
  color: var(--color-gold-2);
}

.footer-icp {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* --- 内页 hero --- */
.page-hero {
  background:
    linear-gradient(180deg, rgba(26, 20, 16, 0.78) 0%, rgba(26, 20, 16, 0.65) 100%),
    radial-gradient(ellipse at center, var(--color-gold-deep) 0%, var(--color-ink) 70%);
  color: var(--color-paper);
  padding-block: var(--space-7) var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 39px, rgba(245, 166, 35, 0.05) 39px, rgba(245, 166, 35, 0.05) 40px);
  pointer-events: none;
}

.page-hero h1 {
  color: var(--color-paper);
  font-size: var(--fs-h1);
  margin-bottom: var(--space-2);
  position: relative;
  z-index: 1;
}

.page-hero p {
  font-size: var(--fs-h4);
  color: rgba(250, 247, 242, 0.8);
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--fs-small);
  color: rgba(250, 247, 242, 0.6);
  margin-bottom: var(--space-2);
  position: relative;
  z-index: 1;
}

.breadcrumb a:hover {
  color: var(--color-gold-2);
}

.breadcrumb-sep {
  color: var(--color-gold-1);
}

/* --- 内容卡片 --- */
.content-card {
  background: var(--color-white);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  margin-bottom: var(--space-3);
}

.content-card h3 {
  margin-bottom: var(--space-2);
  color: var(--color-ink);
}

.content-card p {
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: var(--space-2);
}

.content-card ul {
  margin: var(--space-2) 0;
  padding-left: var(--space-3);
}

.content-card ul li {
  list-style: disc;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 0.5rem;
}

/* --- FAQ --- */
.faq-list {
  margin-top: var(--space-4);
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  overflow: hidden;
  transition: all var(--dur-fast);
}

.faq-item[open] {
  border-color: var(--color-gold-1);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: var(--space-3);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-ink);
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--color-gold-1);
  font-weight: 300;
  transition: transform var(--dur-base);
  flex-shrink: 0;
}

.faq-item[open] .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--space-3) var(--space-3);
  color: var(--color-text-soft);
  line-height: 1.8;
}

/* --- 滚动动画 --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* --- 回到顶部 --- */
.back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--dur-base) var(--ease-out);
  box-shadow: var(--shadow-md);
}

.back-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--color-gold-deep);
  color: var(--color-white);
  transform: translateY(-4px);
}

/* --- 打印 --- */
@media print {
  .site-header,
  .mobile-menu,
  .back-top,
  .header-cta,
  .menu-toggle {
    display: none;
  }
}

/* --- 可访问性 --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- 焦点样式 --- */
:focus-visible {
  outline: 2px solid var(--color-gold-1);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- 实用工具类 --- */
.text-center { text-align: center; }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   乐界乐器 - 音符跳跃动效
   ========================================================================== */
.music-notes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.music-notes .note {
  position: absolute;
  bottom: -40px;
  font-family: var(--font-serif), "Noto Serif SC", serif;
  line-height: 1;
  font-weight: 700;
  opacity: 0;
  animation: note-jump var(--dur, 6s) cubic-bezier(0.5, 0.05, 0.5, 0.95) var(--delay, 0s) infinite;
  will-change: transform, opacity;
  user-select: none;
  filter: drop-shadow(0 2px 4px rgba(26, 20, 16, 0.35));
}

@keyframes note-jump {
  0%   { transform: translate3d(0, 0, 0) scale(0.55) rotate(-10deg); opacity: 0; }
  12%  { opacity: 0.45; }
  25%  { transform: translate3d(8px, -22vh, 0) scale(1.0) rotate(10deg); opacity: 0.5; }
  40%  { transform: translate3d(-10px, -12vh, 0) scale(0.9) rotate(-6deg); opacity: 0.45; }
  55%  { transform: translate3d(8px, -28vh, 0) scale(1.05) rotate(12deg); opacity: 0.5; }
  70%  { transform: translate3d(-6px, -18vh, 0) scale(0.85) rotate(-8deg); opacity: 0.4; }
  85%  { transform: translate3d(3px, -36vh, 0) scale(0.7) rotate(6deg); opacity: 0.3; }
  100% { transform: translate3d(0, -48vh, 0) scale(0.4) rotate(-14deg); opacity: 0; }
}

/* 让 hero 内容压在音符之上 */
.hero-inner,
.page-hero > .container,
.hero-mark { position: relative; z-index: 2; }

/* 头部 logo 印章化 —— 细描边让浅底与浅米底区分 */
.brand-mark {
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(26, 20, 16, 0.18),
              0 0 0 1px rgba(168, 122, 36, 0.55);
}

/* hero 中大徽标 —— 暖柔阴影，强化宣纸感 */
.hero-mark {
  filter: drop-shadow(0 24px 40px rgba(168, 122, 36, 0.18))
          drop-shadow(0 4px 12px rgba(26, 20, 16, 0.10));
}

/* hero 装饰：收紧金色光晕（不再是黑色硬块） */
.hero-visual::before {
  background:
    radial-gradient(circle at 35% 30%,
      rgba(212, 162, 71, 0.10) 0%,
      rgba(168, 122, 36, 0.05) 30%,
      transparent 65%);
}

.hero-visual::after {
  border-color: rgba(168, 122, 36, 0.20);
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  .music-notes { display: none; }
}