/* ============================================================
   GiftCardNairaSwap 主样式表
   说明：整体放大了页面宽度与字体，提升可读性（对应需求3）
   ============================================================ */

:root {
  --green: #0a7d4b;
  --green-dark: #075f38;
  --green-light: #e8f5ee;
  --gold: #f5a623;
  --dark: #14202b;
  --gray: #5b6b7b;
  --gray-light: #eef2f6;
  --border: #dde4ea;
  --red: #d93025;
  --bg: #f6f9fb;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(20, 32, 43, .08);
  --shadow-lg: 0 14px 40px rgba(20, 32, 43, .14);
  --container: 1280px;
  --font: 18px;
}

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

html { font-size: var(--font); scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--dark);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1rem;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ====== 按钮 ====== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 10px; border: none; cursor: pointer;
  font-size: 1rem; font-weight: 600; transition: .2s; text-decoration: none;
  font-family: inherit;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); color: #fff; }
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #e09612; color: #fff; }
.btn-outline { background: transparent; color: var(--green); border: 2px solid var(--green); }
.btn-outline:hover { background: var(--green); color: #fff; }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b3261e; color: #fff; }
.btn-gray { background: var(--gray); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: .9rem; }
.btn-block { width: 100%; }

/* ====== 顶部导航 ====== */
.navbar {
  background: #fff; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 100;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.navbar .logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 800; color: var(--green); }
.navbar .logo .badge { background: var(--gold); color: #fff; font-size: .7rem; padding: 3px 8px; border-radius: 6px; }
.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a { color: var(--dark); padding: 10px 16px; border-radius: 8px; font-weight: 500; }
.nav-menu a:hover, .nav-menu a.active { background: var(--green-light); color: var(--green); text-decoration: none; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.8rem; cursor: pointer; color: var(--green); }

/* ====== Hero ====== */
.hero {
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
  color: #fff; padding: 80px 0 100px; position: relative; overflow: hidden;
}
.hero::after { content: ''; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; background: rgba(255,255,255,.06); border-radius: 50%; }
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 18px; max-width: 760px; }
.hero p { font-size: 1.2rem; opacity: .92; max-width: 640px; margin-bottom: 28px; }
.hero .btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 50px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 2.4rem; font-weight: 800; color: var(--gold); }
.hero-stats .stat .lbl { font-size: .95rem; opacity: .85; }

/* ====== 通用区块 ====== */
.section { padding: 70px 0; }
.section-title { text-align: center; font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--gray); font-size: 1.1rem; margin-bottom: 50px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card { background: #fff; border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow); transition: .2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card .icon { width: 64px; height: 64px; border-radius: 16px; background: var(--green-light); color: var(--green); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; margin-bottom: 20px; }
.card h3 { font-size: 1.35rem; margin-bottom: 10px; }
.card p { color: var(--gray); }

/* ====== 汇率计算器 ====== */
.calc-box { background: #fff; border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-lg); max-width: 720px; margin: 0 auto; }
.calc-box .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.calc-box label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 1rem; }
.calc-box select, .calc-box input { width: 100%; padding: 14px 16px; border: 2px solid var(--border); border-radius: 10px; font-size: 1rem; font-family: inherit; }
.calc-box select:focus, .calc-box input:focus { outline: none; border-color: var(--green); }
.calc-result { background: var(--green-light); border-radius: 12px; padding: 24px; text-align: center; margin-top: 20px; }
.calc-result .amount { font-size: 2.6rem; font-weight: 800; color: var(--green); }

/* ====== 表单 ====== */
.form-card { background: #fff; border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); max-width: 520px; margin: 40px auto; }
.form-card.wide { max-width: 760px; }
.form-card h2 { font-size: 1.8rem; margin-bottom: 8px; }
.form-card .sub { color: var(--gray); margin-bottom: 26px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px 16px; border: 2px solid var(--border); border-radius: 10px;
  font-size: 1rem; font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--green); }
.form-group .hint { font-size: .85rem; color: var(--gray); margin-top: 6px; }
.input-with-btn { display: flex; gap: 10px; }
.input-with-btn input { flex: 1; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ====== 提示 ====== */
.alert { padding: 14px 18px; border-radius: 10px; margin-bottom: 20px; font-size: .98rem; }
.alert-success { background: var(--green-light); color: var(--green-dark); border: 1px solid #bfe3cd; }
.alert-error { background: #fdecea; color: #a5281b; border: 1px solid #f5c6c0; }
.alert-info { background: #e8f0fe; color: #174ea6; border: 1px solid #c2d7fc; }
.errors { background: #fdecea; color: #a5281b; border: 1px solid #f5c6c0; border-radius: 10px; padding: 14px 18px; margin-bottom: 20px; }
.errors ul { margin-left: 18px; }

/* ====== 表格 ====== */
.table-wrap { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
table.data { width: 100%; border-collapse: collapse; }
table.data th { background: var(--gray-light); text-align: left; padding: 16px 18px; font-weight: 700; font-size: .95rem; color: var(--gray); white-space: nowrap; }
table.data td { padding: 16px 18px; border-top: 1px solid var(--border); font-size: .98rem; vertical-align: middle; }
table.data tr:hover { background: #fafcfd; }

/* ====== 状态标签 ====== */
.badge-status { display: inline-block; padding: 5px 12px; border-radius: 20px; font-size: .82rem; font-weight: 600; }
.st-pending { background: #fff4e0; color: #b06a00; }
.st-processing { background: #e8f0fe; color: #174ea6; }
.st-approved, .st-paid { background: var(--green-light); color: var(--green-dark); }
.st-rejected { background: #fdecea; color: #a5281b; }

/* ====== 仪表盘 ====== */
.dash-grid { display: grid; grid-template-columns: 260px 1fr; gap: 30px; margin-top: 30px; }
.dash-side { background: #fff; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); height: fit-content; position: sticky; top: 100px; }
.dash-side .user-box { text-align: center; padding-bottom: 18px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.dash-side .avatar { width: 64px; height: 64px; border-radius: 50%; background: var(--green); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; font-weight: 700; margin: 0 auto 10px; }
.dash-side .menu a { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px; color: var(--dark); font-weight: 500; }
.dash-side .menu a:hover, .dash-side .menu a.active { background: var(--green-light); color: var(--green); text-decoration: none; }
.dash-main { min-width: 0; }
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 30px; }
.stat-card { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.stat-card .lbl { color: var(--gray); font-size: .9rem; margin-bottom: 8px; }
.stat-card .val { font-size: 1.9rem; font-weight: 800; color: var(--green); }
.panel { background: #fff; border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); margin-bottom: 26px; }
.panel h3 { font-size: 1.25rem; margin-bottom: 18px; display: flex; justify-content: space-between; align-items: center; }

/* ====== 上传图片预览 ====== */
.upload-area { border: 2px dashed var(--border); border-radius: 12px; padding: 30px; text-align: center; cursor: pointer; transition: .2s; }
.upload-area:hover { border-color: var(--green); background: var(--green-light); }
.upload-area .big { font-size: 2.4rem; color: var(--green); }
.thumb-list { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
.thumb { width: 120px; height: 120px; border-radius: 10px; overflow: hidden; border: 2px solid var(--border); position: relative; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb .rm { position: absolute; top: 4px; right: 4px; background: rgba(0,0,0,.6); color: #fff; border: none; border-radius: 50%; width: 24px; height: 24px; cursor: pointer; }

/* ====== 图片画廊（订单图片） ====== */
.gallery { display: flex; flex-wrap: wrap; gap: 16px; }
.gallery .gitem { width: 150px; height: 150px; border-radius: 12px; overflow: hidden; border: 2px solid var(--border); cursor: zoom-in; transition: .2s; }
.gallery .gitem:hover { border-color: var(--green); transform: scale(1.03); }
.gallery .gitem img { width: 100%; height: 100%; object-fit: cover; }

/* ====== 图片预览弹窗（双击/点击打开） ====== */
.lightbox { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.88); z-index: 9999; align-items: center; justify-content: center; padding: 40px; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 92%; max-height: 90vh; border-radius: 10px; box-shadow: 0 0 40px rgba(0,0,0,.5); }
.lightbox .close { position: absolute; top: 24px; right: 32px; color: #fff; font-size: 2.6rem; cursor: pointer; line-height: 1; }
.lightbox .nav { position: absolute; top: 50%; transform: translateY(-50%); color: #fff; font-size: 3rem; cursor: pointer; padding: 16px; user-select: none; }
.lightbox .nav.prev { left: 20px; }
.lightbox .nav.next { right: 20px; }

/* ====== 支付凭证 ====== */
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.proof-item { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.proof-item img { width: 100%; height: 200px; object-fit: cover; }
.proof-item .info { padding: 16px; }
.proof-item .info .name { font-weight: 700; }
.proof-item .info .amt { color: var(--green); font-weight: 700; font-size: 1.1rem; }

/* ====== 页脚 ====== */
.footer { background: var(--dark); color: #cdd6df; padding: 60px 0 30px; margin-top: 60px; }
.footer .grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: #fff; margin-bottom: 16px; font-size: 1.1rem; }
.footer a { color: #cdd6df; display: block; padding: 5px 0; }
.footer a:hover { color: var(--gold); }
.footer .bottom { border-top: 1px solid #2a3a47; padding-top: 24px; text-align: center; font-size: .9rem; }

/* ====== 步骤 ====== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.step { text-align: center; }
.step .num { width: 60px; height: 60px; border-radius: 50%; background: var(--green); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; font-weight: 800; margin: 0 auto 18px; }
.step h3 { font-size: 1.25rem; margin-bottom: 8px; }
.step p { color: var(--gray); }

/* ====== 银行信息卡 ====== */
.bank-card { background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%); color: #fff; border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-lg); }
.bank-card .chip { font-size: .85rem; opacity: .8; margin-bottom: 30px; }
.bank-card .acc { font-size: 1.6rem; letter-spacing: 2px; margin-bottom: 16px; font-family: 'Courier New', monospace; }
.bank-card .row { display: flex; justify-content: space-between; }

/* ====== 响应式 ====== */
@media (max-width: 992px) {
  .cards, .steps, .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .dash-grid { grid-template-columns: 1fr; }
  .dash-side { position: static; }
  .footer .grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 2.3rem; }
}
@media (max-width: 640px) {
  html { font-size: 16px; }
  .nav-menu { display: none; position: absolute; top: 78px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 14px; box-shadow: var(--shadow); }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: block; }
  .cards, .steps, .stat-cards, .proof-grid, .form-row, .calc-box .row { grid-template-columns: 1fr; }
  .hero { padding: 50px 0 70px; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 50px 0; }
  .footer .grid { grid-template-columns: 1fr; }
  .table-wrap { overflow-x: auto; }
  table.data { min-width: 600px; }
}