/* ============================================================
   中二猪鼻蛇 · 品牌首页 styles（单屏版）
   令牌对齐 src/styles/base.css v2：玫瑰金粉 #D4A5A5 / 薰衣草 #B8A0C8 / 暖晨曦 #F7F2EC
   胶囊样式复用 src/styles/layout.css tab-btn（品系主题色 + color-mix 渐变）
   ============================================================ */

/* ---------- 设计令牌（与登录后页面同源） ---------- */
:root {
  color-scheme: light;

  /* 主色 — 玫瑰金粉（白化/珊瑚系，马卡龙暖调）*/
  --color-primary: #D4A5A5;
  --color-primary-hover: #C49090;
  --color-primary-active: #B47C7C;
  --color-primary-light: #E8C5C5;

  /* 强调色 — 薰衣草紫系 */
  --color-accent: #B8A0C8;
  --color-accent-hover: #A48DB8;

  --color-success: #88C098;
  --color-warning: #E8C547;
  --color-danger: #C97064;

  /* 中性色（暖晨曦色系）*/
  --color-bg: #F7F2EC;
  --color-surface: #FFFFFF;
  --color-surface-alt: #FAF7F2;
  --color-overlay: rgba(60, 50, 45, 0.5);

  --color-text: #3D352D;
  --color-text-muted: #6D635A;
  --color-text-light: #9A9088;
  --color-text-inverse: #FFFFFF;

  --color-border: #E5DDD3;
  --color-border-strong: #D5CDC3;

  /* 品系胶囊主题色（对齐站点 tab-nav 九色色谱，取其中三色）*/
  --pt-library: #F0C878;  /* 蛇库管理 — 金黄（焦糖 · 我的蛇）*/
  --pt-breed: #A8D8C0;    /* 基因推演 — 薄荷（繁殖中心）*/
  --pt-trace: #D4A5A5;    /* 一物一溯源 — 玫瑰金粉（溯源查询）*/

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-xs: 0 1px 2px rgba(80, 60, 50, 0.08);
  --shadow-sm: 0 2px 4px rgba(80, 60, 50, 0.10), 0 1px 2px rgba(80, 60, 50, 0.06);
  --shadow-md: 0 4px 8px rgba(80, 60, 50, 0.12), 0 2px 4px rgba(80, 60, 50, 0.08);
  --shadow-lg: 0 8px 16px rgba(80, 60, 50, 0.15), 0 4px 8px rgba(80, 60, 50, 0.10);
  --shadow-xl: 0 16px 32px rgba(80, 60, 50, 0.18), 0 8px 16px rgba(80, 60, 50, 0.12);
  --shadow-focus: 0 0 0 3px rgba(212, 165, 165, 0.25);

  --font-sans: 'Outfit', -apple-system, 'Segoe UI', 'Noto Sans CJK SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', Menlo, Consolas, 'Courier New', monospace;

  --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px;

  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- auth-modal 兼容扩展令牌（对齐主应用 src/styles/base.css） ---- */
  --space-1: 4px;
  --color-border-light: #EFE9E1;
  --text-xs: 12px; --text-sm: 14px; --text-base: 16px;
  --text-lg: 18px; --text-xl: 20px; --text-2xl: 24px;
  --font-semibold: 600; --font-bold: 700;
  --duration-fast: 0.15s; --duration-base: 0.28s;
  --ease-fast: ease-out;
  --transition-fast: 0.15s ease;
  --leading-normal: 1.5; --leading-relaxed: 1.7;
}

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

html, body { height: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden; /* 单屏主页，无滚动 */
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---------- 单屏舞台 ---------- */
.stage {
  position: relative;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 中央柔光纱：保证前景文案可读，不遮死背景卡片 */
.stage-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(closest-side, rgba(247, 242, 236, 0.92) 0%, rgba(247, 242, 236, 0.72) 55%, rgba(247, 242, 236, 0.28) 78%, transparent 100%);
}

.stage-veil::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(212, 165, 165, 0.12), transparent 60%),
    radial-gradient(700px 380px at 0% 100%, rgba(184, 160, 200, 0.10), transparent 55%);
}

/* ---------- 前景核心 ---------- */
.stage-core {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 var(--space-6);
  max-width: 720px;
}

.snake-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-4);
}
/* 蛇形线稿在白底上的分离感（暖调微投影） */
.snake-mark svg { filter: drop-shadow(0 1px 2px rgba(80, 60, 50, 0.28)); }

.brand-title {
  font-size: clamp(38px, 6vw, 60px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.slogan {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.2vw, 21px);
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--color-primary-hover);
  margin-bottom: var(--space-6);
}
.slogan .dot { color: var(--color-accent); margin: 0 6px; }

/* ---------- 品系胶囊条（复用站点 tab-btn 设计语言：品系主题色 + color-mix 渐变 + 微光上浮） ---------- */
.points {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}
.point {
  --pt: var(--pt-trace);
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--pt) 16%, var(--color-surface)) 0%,
    color-mix(in srgb, var(--pt) 6%, var(--color-surface)) 100%);
  border: 1px solid color-mix(in srgb, var(--pt) 42%, transparent);
  box-shadow: var(--shadow-xs);
  transition: all 0.25s var(--ease-bounce);
  white-space: nowrap;
}
.point--library { --pt: var(--pt-library); }
.point--breed    { --pt: var(--pt-breed); }
.point--trace    { --pt: var(--pt-trace); }
.point:hover {
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--pt) 22%, var(--color-surface)) 0%,
    color-mix(in srgb, var(--pt) 8%, var(--color-surface)) 100%);
  border-color: color-mix(in srgb, var(--pt) 50%, transparent);
  box-shadow: var(--shadow-sm), 0 0 12px color-mix(in srgb, var(--pt) 25%, transparent);
  transform: translateY(-1px);
}

/* ---------- 主按钮：品系暖色谱渐变（桃粉→金黄→琥珀），呼应品系多样性 ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 13px 42px;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text);
  background: linear-gradient(135deg, #FFB5C5 0%, #F0C878 55%, #E8B058 100%);
  box-shadow: var(--shadow-md), 0 4px 14px rgba(232, 176, 88, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.btn-primary:hover {
  filter: brightness(1.04) saturate(1.06);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 6px 20px rgba(232, 176, 88, 0.38);
}
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-md); }
.btn-primary:focus-visible { outline: none; box-shadow: var(--shadow-focus), var(--shadow-md); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; filter: none; }
.btn-block { width: 100%; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 11px 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary-hover); }

/* ---------- auth-modal 兼容：primary / secondary 按钮（对齐主应用按钮语义） ---------- */
.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 26px;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: var(--font-bold);
  font-size: 15px;
  color: var(--color-text);
  background: linear-gradient(135deg, #FFB5C5 0%, #F0C878 55%, #E8B058 100%);
  box-shadow: var(--shadow-sm), 0 3px 10px rgba(232, 176, 88, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.primary-btn:hover { filter: brightness(1.04) saturate(1.06); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.primary-btn:active { transform: translateY(0); box-shadow: var(--shadow-xs); }
.primary-btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; filter: none; }

.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: var(--font-semibold);
  font-size: 14px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.secondary-btn:hover { border-color: var(--color-primary); color: var(--color-primary-hover); }
.secondary-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---------- 背景蛇品系卡（保留原散射实现，暖调浅色皮肤） ---------- */
.bg-scatter { position: absolute; inset: 0; z-index: 0; }
.bg-card {
  position: absolute;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  overflow: hidden;
  opacity: 0;
  box-shadow: var(--shadow-xs);
  transform: translateY(18px);
  transition: opacity 1.2s ease, transform 1.2s cubic-bezier(.2, .8, .2, 1), box-shadow 0.3s;
}
.bg-card.on { opacity: 0.88; transform: translateY(0); }
.bg-card:hover { opacity: 1; box-shadow: var(--shadow-lg); z-index: 3; }
.bg-card img { width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.bg-card .cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(0deg, rgba(60, 50, 45, 0.72), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.bg-card:hover .cap { opacity: 1; }

/* ---------- 角标联系方式（悬浮胶囊，非页脚） ---------- */
.contact-chip {
  position: absolute;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.contact-chip:hover {
  color: var(--color-primary-hover);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
}

/* ---------- 登录 / 注册 Modal（对齐站点模态规范） ---------- */
.auth-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--color-overlay);
  backdrop-filter: blur(4px);
}
.auth-overlay.open { display: flex; }
.auth-modal {
  width: min(400px, 92vw);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-xl);
  position: relative;
  animation: modalIn 0.3s cubic-bezier(.2, .8, .2, 1);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.auth-close {
  position: absolute; top: 14px; right: 14px;
  background: none; border: none;
  color: var(--color-text-light);
  cursor: pointer; font-size: 22px; line-height: 1;
}
.auth-close:hover { color: var(--color-text); }
.auth-modal h3 { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.auth-sub { font-size: 14px; color: var(--color-text-muted); margin-bottom: var(--space-6); }
.auth-input {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  margin-bottom: var(--space-4);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.auth-input::placeholder { color: var(--color-text-light); }
.auth-input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); }
.auth-row { display: flex; align-items: center; }
.auth-row .auth-input { margin-bottom: 0; }
.auth-row .code-btn { margin-left: var(--space-3); flex-shrink: 0; height: 40px; }
.auth-form .btn-primary { margin-top: var(--space-2); }
.auth-note { text-align: center; font-size: 12px; color: var(--color-text-light); margin-top: var(--space-4); }
.auth-link { color: var(--color-primary-hover); cursor: pointer; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .points { gap: var(--space-2); }
  .point { padding: 0.42rem 0.95rem; font-size: 0.82rem; }
  .contact-chip { right: var(--space-3); bottom: var(--space-3); font-size: 11px; }
  .snake-mark { width: 58px; height: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-card { transition: none; }
  .auth-modal { animation: none; }
}