:root {
  /* 祥研勇创 (XIANGYAN YONGCHUANG FOOD) 最终钦定版：【宋代宣纸暖米 (#F7F1E5) × 故宫朱砂红印 (#A8261A) + 檀黑棕字标 (#2E1E16)】标准VI系统 */
  --xyyc-navy: #2E1E16;          /* 核心字标与结构色：古法檀黑棕 (Pantone 412 C · 实测自最终版「祥研勇创食品」中英文字标) */
  --xyyc-navy-deep: #1D120D;     /* 极深焙茶檀黑 (用于顶部合规栏与页脚沉稳底色) */
  --xyyc-navy-mid: #432B20;      /* 暖檀木棕 (用于次级边框与悬停) */
  --xyyc-navy-light: #F7F1E5;    /* 宋代宣纸暖米 (核心背景色，实测自最终版LOGO底色) */
  --xyyc-red: #A8261A;           /* 核心印章色：故宫朱砂红印 (Pantone 7621 C · 实测自最终版「祥研勇创」双环四字圆印，代表白纸红印、一印千金) */
  --xyyc-red-dark: #861B11;      /* 深朱砂红 (用于主按钮悬停) */
  --xyyc-gold: #C5A565;          /* 辅助描边色：哑光香槟金 (用于印章外框与礼盒流光点缀) */
  --xyyc-gold-bright: #F5E6C8;   /* 宣纸暖金高光 (深檀棕底上的高对比度文字) */
  --xyyc-gold-dark: #8C4A18;     /* 桂圆琥珀暖棕 (浅色底上的辅助强调色) */
  --xyyc-gold-bg: #F7F1E5;       /* 宋代宣纸暖米底 */

  /* 三大代工产品线终端包装同源色 */
  --xyyc-rosewood: #2E1E16;      /* 檀黑棕 */
  --xyyc-longan-amber: #B85D19;  /* 桂圆琥珀色 */
  --xyyc-jade: #163024;          /* 东方本草深森绿 (《颂妈》《益生龙珠》包装色) */
  --xyyc-jade-dark: #0B1B13;
  --xyyc-jade-light: #EFF5F1;
  --xyyc-amber: #D97706;         /* 桂圆抱莲子暖珀橙 */
  --xyyc-obsidian: #241812;      /* 太武三宝黑麻油深檀黑 */

  /* 宋代宣纸暖米 + 檀黑字高可读性阅读系统 (100% 契合最终版LOGO宣纸底与全局浅色高可读规范) */
  --bg-main: #F7F1E5;
  --bg-alt: #EFE7D6;
  --bg-card: #FFFFFF;
  --text-primary: #1E140F;
  --text-secondary: #2E1E16;
  --text-muted: #4A372D;
  --border-color: #DFD3BE;
  --shadow-sm: 0 4px 14px rgba(46, 30, 22, 0.07);
  --shadow-md: 0 12px 32px rgba(46, 30, 22, 0.13);
  --radius-md: 12px;
  --radius-lg: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans", "Noto Sans KR", "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
}

a {
  color: var(--xyyc-navy);
  text-decoration: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Compliance Bar (Deep Sapphire Blue + Brushed Matte Gold Trim) */
.top-bar {
  background: linear-gradient(90deg, var(--xyyc-navy-deep) 0%, var(--xyyc-navy) 50%, var(--xyyc-navy-deep) 100%);
  color: #FFFFFF;
  font-size: 13.5px;
  padding: 9px 0;
  border-bottom: 2px solid var(--xyyc-gold);
}
.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.license-pill {
  background: var(--xyyc-gold);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 800;
  color: #071626;
  margin-right: 8px;
}
.lang-switcher {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.lang-btn {
  background: rgba(255, 255, 255, 0.08);
  color: var(--xyyc-gold-bright);
  border: 1px solid rgba(197, 165, 101, 0.5);
  padding: 4px 10px;
  border-radius: 5px;
  font-size: 12.5px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}
.lang-btn.active, .lang-btn:hover {
  background: var(--xyyc-red);
  color: #FFFFFF;
  border-color: var(--xyyc-gold-bright);
  font-weight: 800;
}

/* Sticky Navigation with Official 4-Character Circular Seal Corporate Logo (Song Rice Paper x Cinnabar Red Seal) */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FAF6EE;
  border-bottom: 2.5px solid var(--xyyc-red);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 84px;
  padding: 8px 0;
  gap: 16px;
}
.brand-identity {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.xyyc-logo-badge {
  width: 64px;
  height: 64px;
  background: #F7F1E5;
  border: 2px solid var(--xyyc-red);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(168, 38, 26, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
  overflow: hidden;
}
.brand-logo {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-size: 19px;
  font-weight: 900;
  color: var(--xyyc-navy);
  letter-spacing: 0.4px;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  white-space: nowrap;
}
.brand-sub {
  font-size: 12px;
  color: var(--xyyc-red);
  font-weight: 800;
  letter-spacing: 0.2px;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 14px;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav-links a {
  color: var(--xyyc-navy);
  padding: 6px 4px;
}
.nav-links a:hover {
  color: var(--xyyc-red);
  border-bottom: 2.5px solid var(--xyyc-red);
}

/* Hero Section (Song Rice Paper Warmth + Cinnabar Seal & Sandalwood Typography) */
.hero {
  background: linear-gradient(180deg, #EFE7D6 0%, #F7F1E5 100%);
  padding: 44px 0 52px;
  border-bottom: 2px solid var(--xyyc-gold);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
}
.market-mode-badge {
  display: inline-block;
  background: var(--xyyc-red);
  color: #FFFFFF;
  border: 1.5px solid var(--xyyc-gold);
  padding: 6px 15px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 800;
  margin-bottom: 14px;
  box-shadow: 0 3px 10px rgba(168, 38, 26, 0.22);
}
.hero h1 {
  font-size: 31px;
  line-height: 1.32;
  font-weight: 900;
  color: var(--xyyc-navy);
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.trust-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.metric-box {
  background: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-left: 5px solid var(--xyyc-red);
  padding: 12px 14px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}
.metric-val {
  font-size: 20px;
  font-weight: 900;
  color: var(--xyyc-red);
}
.metric-lbl {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 600;
}
.btn-group {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--xyyc-red) 0%, var(--xyyc-red-dark) 100%);
  color: #FFFFFF;
  border: 1.5px solid var(--xyyc-gold);
  padding: 13px 24px;
  border-radius: 8px;
  font-size: 15.5px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(168, 38, 26, 0.28);
}
.btn-primary:hover {
  background: var(--xyyc-red-dark);
}
.btn-outline {
  background: #FFFFFF;
  color: var(--xyyc-navy);
  border: 2px solid var(--xyyc-navy);
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 15.5px;
  font-weight: 800;
  cursor: pointer;
}
.hero-visual-card {
  background: #FFFFFF;
  border: 2px solid var(--xyyc-gold);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-md);
}
.hero-visual-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 10px;
  display: block;
}
.hero-thumb-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.hero-thumb-row img {
  width: 100%;
  height: 92px;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 0;
  border: 1px solid var(--border-color);
  display: block;
}

/* Corporate VI & Logo Standard Showcase Section */
.vi-showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 18px;
}
.vi-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.vi-logo-stage {
  height: 196px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0;
  margin-bottom: 14px;
  overflow: hidden;
  border: 1.5px solid #D5C4A1;
}
.vi-seal-plate {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.swatch-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.swatch-chip {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,0.15);
}

/* Section Layout */
.section {
  padding: 54px 0;
  border-bottom: 1px solid var(--border-color);
}
.section-alt {
  background-color: var(--bg-alt);
}
.section-header {
  margin-bottom: 28px;
}
.section-tag {
  display: inline-block;
  background: var(--xyyc-navy);
  color: var(--xyyc-gold-bright);
  border: 1px solid var(--xyyc-gold);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: 0.4px;
}
.section-title {
  font-size: 27px;
  font-weight: 900;
  color: var(--xyyc-navy);
  margin-bottom: 8px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
}

/* 3-Product Cards & Flagship Highlight */
.flagship-banner {
  background: #FFFFFF;
  border: 2.5px solid var(--xyyc-navy);
  border-top: 5px solid var(--xyyc-gold);
  border-radius: var(--radius-lg);
  padding: 26px;
  margin-bottom: 26px;
  box-shadow: var(--shadow-md);
}
.flagship-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 28px;
  align-items: stretch;
}
.flagship-img-main {
  width: 100%;
  height: 315px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  display: block;
}
.flagship-left-specs {
  margin-top: 10px;
  background: #FAF6EE;
  border: 1px solid #DECBA8;
  border-left: 4px solid var(--xyyc-red);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13.5px;
  color: #2E1E16;
  line-height: 1.55;
}
.sister-grid, .calc-grid, .license-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.product-card, .panel-box, .license-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-top: 3.5px solid var(--xyyc-navy);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.product-card img {
  width: 100%;
  height: 268px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 14px;
  border: 1px solid var(--border-color);
  background: #FBF6EC;
  display: block;
}
.weight-badge {
  background: var(--xyyc-navy);
  color: var(--xyyc-gold-bright);
  border: 1px solid var(--xyyc-gold);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12.5px;
  font-weight: 800;
  display: inline-block;
  margin-bottom: 8px;
}
.table-wrap { overflow-x: auto; margin-top: 14px; }
.b2b-table { width: 100%; border-collapse: collapse; background: #FFFFFF; font-size: 14.5px; }
.b2b-table th { background: var(--xyyc-navy); color: var(--xyyc-gold-bright); text-align: left; padding: 11px 14px; font-weight: 800; border: 1px solid var(--xyyc-navy-mid); }
.b2b-table td { padding: 11px 14px; border: 1px solid var(--border-color); color: #111111; vertical-align: top; }
.b2b-table tr:nth-child(even) td { background: #FAF8F4; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 800; margin-bottom: 6px; color: #111111; font-size: 14.5px; }
.form-control { width: 100%; padding: 10px 12px; border: 1.5px solid #9CA3AF; border-radius: 6px; font-size: 15px; color: #111111; background: #FFFFFF; }
.capsule-group { display: flex; flex-wrap: wrap; gap: 8px; }
.capsule-item { border: 1.5px solid var(--border-color); background: #FAF8F4; color: #111111; padding: 7px 13px; border-radius: 6px; font-size: 13.5px; font-weight: 700; cursor: pointer; }
.capsule-item.selected { background: var(--xyyc-navy); border-color: var(--xyyc-gold); color: var(--xyyc-gold-bright); font-weight: 900; }
.license-card { text-align: center; }
.license-card img { width: 100%; height: 290px; object-fit: contain; background: #FAF6EE; padding: 8px; border: 1px solid var(--border-color); border-radius: 6px; margin-bottom: 12px; display: block; }
.footer { background: linear-gradient(180deg, var(--xyyc-navy) 0%, var(--xyyc-navy-deep) 100%); color: #FFFFFF; padding: 40px 0; font-size: 14px; border-top: 3px solid var(--xyyc-gold); }
@media (max-width: 900px) {
  .hero-grid, .flagship-grid, .sister-grid, .calc-grid, .license-grid, .trust-metrics, .vi-showcase-grid { grid-template-columns: 1fr; }
}