:root {
  --primary: #00c4b8;
  --primary-dark: #00a89a;
  --accent-red: #fe2c55;
  --accent-green: #25d366;
  --black: #121212;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-400: #9e9e9e;
  --gray-600: #616161;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.12);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --header-h: 52px;
  --tabbar-h: 56px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--gray-100);
  color: var(--black);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--gray-100);
  position: relative;
  box-shadow: 0 0 60px rgba(0,0,0,.06);
}

.hidden { display: none !important; }

/* Header */
.app-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--gray-200);
}
.app-header.transparent { background: transparent; border: none; position: absolute; width: 100%; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 18px; letter-spacing: -.3px; }
.logo-icon {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--black), #333);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 16px;
}
.header-btn {
  width: 40px; height: 40px; border: none; background: none;
  cursor: pointer; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--black);
}
.header-back { font-size: 22px; margin-right: 4px; }

/* Tabbar */
#tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: calc(var(--tabbar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  display: flex;
  z-index: 200;
}
.tab-item {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; text-decoration: none; color: var(--gray-400); font-size: 10px; font-weight: 500;
  border: none; background: none; cursor: pointer; padding: 6px 0;
}
.tab-item.active { color: var(--black); }
.tab-item svg { width: 22px; height: 22px; }

/* Page */
#page { min-height: calc(100vh - var(--tabbar-h)); padding-bottom: calc(var(--tabbar-h) + var(--safe-bottom) + 16px); }
#page.no-tabbar { padding-bottom: 16px; min-height: 100vh; }
#page.no-tabbar.lang-mode { padding-bottom: 16px; }

/* Buttons */
.btn {
  display: flex; align-items: center; justify-content: center;
  width: 100%; padding: 14px 24px; border: none; border-radius: var(--radius-full);
  font-family: var(--font); font-size: 15px; font-weight: 600; cursor: pointer;
  transition: transform .15s, opacity .15s;
}
.btn:active { transform: scale(.98); opacity: .9; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: var(--white); }
.btn-dark { background: var(--black); color: var(--white); }
.btn-outline { background: var(--white); color: var(--gray-600); border: 1px solid var(--gray-200); }
.btn-green { background: var(--accent-green); color: var(--white); }

/* Inputs */
.input-group { margin-bottom: 16px; }
.input-group label { display: block; font-size: 13px; color: var(--gray-600); margin-bottom: 8px; }
.input-wrap { position: relative; }
.input {
  width: 100%; padding: 14px 16px; border: 1px solid var(--gray-200);
  border-radius: var(--radius); font-size: 15px; font-family: var(--font);
  background: var(--white); outline: none; transition: border-color .2s;
}
.input:focus { border-color: var(--primary); }
.input-hint { font-size: 12px; color: var(--gray-400); margin-top: 6px; }
.input-error { font-size: 12px; color: var(--accent-red); margin-top: 6px; }
.pwd-toggle { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); background: none; border: none; cursor: pointer; font-size: 18px; color: var(--gray-400); }

/* Cards */
.card {
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
}
.balance-card-dark {
  background: linear-gradient(145deg, #1a1a1a, #000);
  color: var(--white); padding: 24px; border-radius: var(--radius-lg);
}
.balance-card-dark .label { font-size: 13px; opacity: .7; }
.balance-card-dark .amount { font-size: 32px; font-weight: 800; margin-top: 4px; letter-spacing: -.5px; }

.balance-card-light {
  background: var(--white); padding: 24px; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); margin-top: -60px; position: relative; z-index: 10;
}
.balance-card-light .balance-main { font-size: 28px; font-weight: 800; color: var(--primary); }
.stats-row { display: flex; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--gray-200); }
.stat-item { flex: 1; text-align: center; }
.stat-item .val { font-size: 20px; font-weight: 700; }
.stat-item .lbl { font-size: 12px; color: var(--gray-400); margin-top: 2px; }

/* Hero */
.hero-banner {
  height: 200px; background-size: cover; background-position: center;
  position: relative; overflow: hidden;
}
.hero-banner.dark { background: linear-gradient(135deg, #1a1a2e, #16213e); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,.6)); }
.hero-text { position: absolute; bottom: 70px; left: 20px; right: 20px; color: var(--white); }
.hero-text h2 { font-size: 22px; font-weight: 800; }
.hero-text h2 span { color: var(--accent-red); }
.hero-text p { font-size: 12px; opacity: .85; margin-top: 6px; line-height: 1.4; }

/* Brand scroll */
.brand-scroll { display: flex; gap: 8px; padding: 12px 16px; overflow-x: auto; scrollbar-width: none; }
.brand-scroll::-webkit-scrollbar { display: none; }
.brand-tag {
  flex-shrink: 0; padding: 8px 16px; background: var(--black); color: var(--white);
  border-radius: var(--radius-full); font-size: 11px; font-weight: 700; letter-spacing: 1px;
  border: none; cursor: pointer;
}
.brand-tag.active { background: var(--primary); }

/* Quick actions */
.quick-grid { display: flex; justify-content: space-around; padding: 20px 16px; background: var(--white); }
.quick-item { text-align: center; text-decoration: none; color: var(--black); cursor: pointer; background: none; border: none; font-family: var(--font); }
.quick-icon { width: 48px; height: 48px; background: var(--gray-100); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin: 0 auto 8px; font-size: 22px; }
.quick-item span { font-size: 12px; font-weight: 500; }

/* Commission feed */
.commission-section { margin: 16px; }
.section-title { font-size: 15px; font-weight: 700; margin-bottom: 12px; display: flex; align-items: center; gap: 6px; }
.commission-list { background: var(--black); border-radius: var(--radius-lg); overflow: hidden; max-height: 220px; }
.commission-item { display: flex; align-items: center; padding: 12px 16px; color: var(--white); font-size: 13px; border-bottom: 1px solid rgba(255,255,255,.08); }
.commission-item .avatar { width: 32px; height: 32px; border-radius: 50%; background: #333; margin-right: 12px; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.commission-item .amount { margin-left: auto; color: var(--primary); font-weight: 600; }

/* Order tabs */
.order-tabs { display: flex; background: var(--white); padding: 0 8px; border-bottom: 1px solid var(--gray-200); position: sticky; top: var(--header-h); z-index: 50; }
.order-tab {
  flex: 1; padding: 14px 4px; text-align: center; font-size: 14px; font-weight: 500;
  color: var(--gray-400); background: none; border: none; cursor: pointer;
  border-bottom: 2px solid transparent; font-family: var(--font);
}
.order-tab.active { color: var(--black); font-weight: 700; border-bottom-color: var(--black); }

/* Order card */
.order-card { margin: 12px 16px; padding: 16px; }
.order-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 12px; color: var(--gray-400); }
.order-card-body { display: flex; gap: 12px; }
.order-card-body img { width: 80px; height: 80px; border-radius: 8px; object-fit: cover; background: var(--gray-100); }
.order-card-info { flex: 1; min-width: 0; }
.order-card-info h4 { font-size: 13px; font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.order-meta { margin-top: 8px; font-size: 12px; }
.order-meta .commission { color: var(--accent-red); font-weight: 700; font-size: 14px; margin-top: 4px; }
.order-card-footer { display: flex; justify-content: flex-end; margin-top: 12px; }
.btn-sm { width: auto; padding: 8px 24px; font-size: 13px; }

/* Profile */
.profile-hero {
  margin: 16px; padding: 24px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #fe2c55, #00f2ea, #ff0050);
  background-size: 200% 200%; animation: gradient 8s ease infinite;
}
@keyframes gradient { 0%,100%{background-position:0% 50%} 50%{background-position:100% 50%} }
.profile-info-box {
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  border-radius: var(--radius); padding: 16px; font-size: 13px;
}
.profile-info-box div { margin-bottom: 6px; }
.profile-info-box strong { font-weight: 600; }
.copy-btn { background: none; border: none; cursor: pointer; margin-left: 6px; font-size: 14px; }
.balance-section { margin: 0 16px 16px; padding: 20px; display: flex; align-items: center; justify-content: space-between; }
.balance-section .big { font-size: 28px; font-weight: 800; }
.balance-actions { display: flex; gap: 16px; }
.balance-action { text-align: center; text-decoration: none; color: var(--black); background: none; border: none; cursor: pointer; font-family: var(--font); font-size: 11px; }
.balance-action .icon { width: 40px; height: 40px; background: var(--gray-100); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 4px; font-size: 18px; }

.menu-list { margin: 0 16px; }
.menu-item {
  display: flex; align-items: center; padding: 16px; text-decoration: none; color: var(--black);
  border-bottom: 1px solid var(--gray-100); cursor: pointer; background: var(--white);
}
.menu-item:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.menu-item:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg); border-bottom: none; }
.menu-item .icon { width: 36px; height: 36px; background: var(--gray-100); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-right: 14px; font-size: 16px; }
.menu-item .arrow { margin-left: auto; color: var(--gray-400); }
.logout-btn { margin: 20px 16px; padding: 14px; text-align: center; color: var(--accent-red); font-weight: 600; background: var(--white); border: none; border-radius: var(--radius-lg); width: calc(100% - 32px); cursor: pointer; font-family: var(--font); font-size: 15px; }

/* Login */
.login-hero { height: 220px; background: linear-gradient(160deg, #0f0f0f 60%, #00c4b8); position: relative; overflow: hidden; }
.login-hero-content { padding: 40px 24px; color: var(--white); }
.login-hero-content h3 { font-size: 14px; opacity: .8; letter-spacing: 2px; text-transform: uppercase; }
.login-form { padding: 24px; background: var(--white); border-radius: var(--radius-lg) var(--radius-lg) 0 0; margin-top: -20px; position: relative; }
.login-form h1 { font-size: 28px; font-weight: 800; margin-bottom: 4px; }
.login-form .sub { color: var(--gray-400); font-size: 14px; margin-bottom: 24px; }
.link-red { color: var(--accent-red); text-decoration: none; font-size: 13px; float: right; margin-top: 12px; }

/* Language */
.lang-page { min-height: calc(100vh - var(--header-h)); display: flex; flex-direction: column; background: var(--white); }
.lang-page-inapp { min-height: auto; flex: 1; }
.lang-page-head { padding: 8px 20px 16px; }
.lang-page-head h2 { font-size: 20px; font-weight: 800; }
.lang-page-sub { font-size: 13px; color: var(--gray-400); margin-top: 6px; }
.lang-list { flex: 1; overflow-y: auto; }
.lang-item {
  display: flex; align-items: center; padding: 16px 20px; cursor: pointer;
  border-bottom: 1px solid var(--gray-100); font-size: 15px; transition: background .15s;
}
.lang-item:active { background: var(--gray-100); }
.lang-item.active { background: #e8f8f6; }
.lang-item .flag { font-size: 24px; margin-right: 14px; flex-shrink: 0; }
.lang-item .lang-name { flex: 1; }
.lang-item .check { margin-left: auto; color: var(--primary); font-weight: 700; display: none; font-size: 18px; }
.lang-item.active .check { display: block; }
.lang-footer { background: var(--black); padding: 24px 20px calc(24px + var(--safe-bottom)); }
.lang-footer-link { text-align: center; margin-top: 12px; }
.lang-footer-link a { color: var(--accent-red); text-decoration: none; font-size: 13px; }

/* Modal */
#modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 300; max-width: 430px; margin: 0 auto; left: 0; right: 0; }
#modal {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 92%; max-width: 380px; max-height: 85vh; overflow-y: auto;
  background: var(--white); border-radius: var(--radius-lg); z-index: 301;
  padding: 24px 20px;
}
.modal-icon { width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; font-size: 28px; }
.modal-icon.success { background: #e8f8e8; }
.modal-icon.lucky { background: #e8f8e8; }
.modal-title { text-align: center; font-size: 18px; font-weight: 700; }
.modal-sub { text-align: center; font-size: 13px; color: var(--gray-400); margin-top: 4px; }
.alert-box { background: #fff3e0; border-radius: var(--radius); padding: 12px; margin: 16px 0; font-size: 13px; line-height: 1.5; color: #e65100; }
.modal-product { display: flex; gap: 12px; margin: 16px 0; padding: 12px; background: var(--gray-50); border-radius: var(--radius); }
.modal-product img { width: 64px; height: 64px; border-radius: 8px; object-fit: cover; }
.modal-product .price { color: var(--accent-red); font-weight: 700; font-size: 16px; margin-top: 4px; }
.detail-table { width: 100%; font-size: 13px; }
.detail-table tr td { padding: 6px 0; }
.detail-table tr td:first-child { color: var(--gray-400); }
.detail-table tr td:last-child { text-align: right; font-weight: 500; }
.detail-table .total td { font-weight: 800; color: var(--accent-red); font-size: 16px; }
.stars { display: flex; gap: 4px; justify-content: center; margin: 12px 0; font-size: 24px; cursor: pointer; }
.modal-actions { display: flex; gap: 12px; margin-top: 16px; }
.modal-actions .btn { flex: 1; padding: 12px; font-size: 14px; }

/* Recharge / Withdraw page */
.page-content { padding: 16px; }
.form-card { padding: 20px; margin-bottom: 12px; }
.copy-row { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.copy-row code { flex: 1; font-size: 12px; word-break: break-all; background: var(--gray-100); padding: 10px; border-radius: 8px; }
.upload-box {
  width: 100px; height: 100px; border: 2px dashed var(--gray-200); border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer; color: var(--gray-400); font-size: 12px; margin-top: 8px; overflow: hidden;
}
.upload-box img { width: 100%; height: 100%; object-fit: cover; }
.tips-box { margin-top: 20px; font-size: 12px; color: var(--gray-600); line-height: 1.8; }
.tips-box h4 { font-size: 13px; margin-bottom: 8px; color: var(--black); }

/* Steps */
.steps-box { margin: 16px; padding: 20px; }
.steps-box h3 { font-size: 15px; font-weight: 700; margin-bottom: 12px; }
.steps-box p { font-size: 13px; color: var(--gray-600); margin-bottom: 8px; line-height: 1.6; }

/* Toast */
#toast {
  position: fixed; top: 60px; left: 50%; transform: translateX(-50%) translateY(-20px);
  background: rgba(0,0,0,.85); color: var(--white); padding: 10px 20px; border-radius: var(--radius-full);
  font-size: 13px; z-index: 999; opacity: 0; transition: all .3s; pointer-events: none; max-width: 90%; text-align: center;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Loading */
.loading { display: flex; align-items: center; justify-content: center; padding: 40px; }
.spinner { width: 32px; height: 32px; border: 3px solid var(--gray-200); border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.empty { text-align: center; padding: 60px 20px; color: var(--gray-400); }
.empty-icon { font-size: 48px; margin-bottom: 12px; opacity: .5; }

/* Text page */
.text-page { padding: 20px; font-size: 14px; line-height: 1.8; white-space: pre-wrap; color: var(--gray-600); }

/* Banner full */
.banner-full { width: 100%; display: block; border-radius: var(--radius-lg); margin: 0 16px 16px; width: calc(100% - 32px); }