:root {
  --brand-dark: #1a1a1a;
  --brand-accent: #1f3864;
  --brand-accent-light: #2d4f8a;
  --text-light: #f5f5f0;
  --text-muted: #8a8a8a;
  --bg-page: #ffffff;
  --bg-section: #f4f5f7;
}

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

body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  color: var(--brand-dark);
  background: var(--bg-page);
  line-height: 1.6;
}

header {
  background: var(--bg-page);
  color: var(--brand-dark);
  border-bottom: 1px solid #e2e4e8;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

header .brand a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

header .brand img { height: 52px; display: block; }

header .brand .brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

header .brand .brand-en {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--brand-accent);
}

header .brand .brand-zh {
  font-size: 0.8rem;
  letter-spacing: 3px;
  color: var(--text-muted);
}

nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

nav a {
  color: var(--brand-dark);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover { color: var(--brand-accent); }

#lang-toggle {
  background: transparent;
  border: 1px solid #c9ccd3;
  color: var(--brand-dark);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}

#lang-toggle:hover { border-color: var(--brand-accent); color: var(--brand-accent); }

.hero {
  background: var(--brand-accent);
  color: var(--text-light);
  padding: 80px 24px;
  text-align: center;
}

.hero h1 { font-size: 2.2rem; margin-bottom: 16px; }

.hero .slogan-zh {
  font-size: 1.5rem;
  letter-spacing: 3px;
  margin-bottom: 10px;
}

.hero .slogan-en {
  font-size: 1.05rem;
  color: #b9c4da;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.hero p {
  color: #d4dbe8;
  max-width: 580px;
  margin: 0 auto 28px;
}

.btn {
  display: inline-block;
  background: var(--brand-accent);
  color: var(--text-light);
  padding: 12px 28px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
}

.btn:hover { background: var(--brand-accent-light); }

.hero .btn {
  background: var(--text-light);
  color: var(--brand-accent);
}

.hero .btn:hover { background: #ffffff; }

.btn-outline {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--brand-accent);
  color: var(--brand-accent);
  padding: 10px 22px;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.9rem;
}

.btn-outline:hover { background: var(--brand-accent); color: var(--text-light); }

section {
  padding: 60px 24px;
  max-width: 1000px;
  margin: 0 auto;
}

section.alt { background: var(--bg-section); max-width: none; }
section.alt > div { max-width: 1000px; margin: 0 auto; }

h2 { font-size: 1.6rem; margin-bottom: 24px; text-align: center; }
h3 { font-size: 1.1rem; margin-bottom: 8px; }

.lead {
  text-align: center;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-page);
  border: 1px solid #e2e4e8;
  border-radius: 6px;
  overflow: hidden;
}

.card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
}

.card-body { padding: 16px; }
.card-body h3 { margin-bottom: 6px; font-size: 1.05rem; }
.card-body p { color: var(--text-muted); font-size: 0.9rem; }

/* 照片占位框 —— 用于尚未上传照片的作品位 */
.photo-placeholder {
  width: 100%;
  height: 190px;
  background: #e8eaee;
  border: 1px dashed #c3c7cf;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 8px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

/* 流程步骤 */
.step {
  border-left: 3px solid var(--brand-accent);
  padding-left: 20px;
  margin-bottom: 36px;
}

.step:last-child { margin-bottom: 0; }

.step-num {
  color: var(--brand-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

/* 团队卡片 */
.team-card {
  background: var(--bg-page);
  border: 1px solid #e2e4e8;
  border-radius: 6px;
  padding: 24px;
}

.team-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--text-muted);
  border: 1px solid #d5d8de;
  border-radius: 3px;
  padding: 3px 8px;
  margin-bottom: 12px;
}

/* 平台图标按钮 */
.platform-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.platform-btn {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid #d5d8de;
  border-radius: 4px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  cursor: default;
}

.platform-btn:hover { border-color: var(--brand-accent); color: var(--brand-accent); }

/* 免责声明区块 */
.disclaimer {
  max-width: 760px;
  margin: 0 auto;
  border: 1px solid #dfe2e7;
  border-radius: 6px;
  padding: 24px;
  background: var(--bg-page);
}

.disclaimer h3 { font-size: 1rem; margin-bottom: 12px; }
.disclaimer p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.8; margin-bottom: 10px; }
.disclaimer p:last-child { margin-bottom: 0; }
.disclaimer a { color: var(--brand-accent); }

form {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label { font-size: 0.9rem; font-weight: 600; }

input, textarea {
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.95rem;
}

textarea { min-height: 120px; resize: vertical; }

button[type="submit"] {
  background: var(--brand-accent);
  border: none;
  color: var(--text-light);
  padding: 12px;
  border-radius: 4px;
  font-weight: 700;
  cursor: pointer;
  font-size: 1rem;
}

button[type="submit"]:hover { background: var(--brand-accent-light); }

footer {
  background: var(--brand-accent);
  color: #b9c4da;
  text-align: center;
  padding: 24px;
  font-size: 0.85rem;
}

footer a { color: #d4dbe8; }

html[data-lang="en"] [data-zh] { display: none; }
html[data-lang="zh"] [data-en] { display: none; }