/* ========== 基础变量 ========== */
:root {
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --rose-50: #fff1f2;
    --rose-500: #f43f5e;

    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    --bg: #ffffff;
    --bg-alt: #f5f8fc;
    --surface: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: #e2e8f0;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 4px rgba(37, 99, 235, 0.06);
    --shadow-md: 0 4px 16px rgba(37, 99, 235, 0.08);
    --radius: 10px;
    --radius-lg: 14px;
    --transition: 0.2s ease;
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'Consolas', 'Liberation Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--text-primary); line-height: 1.65; overflow-x: hidden; }
body.locked { overflow: hidden; }
a { color: var(--blue-600); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-700); }

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* ========== 顶部导航 ========== */
.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    max-width: 960px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 56px; padding: 0 24px;
}
.logo { display: flex; align-items: center; gap: 9px; }
.logo-icon {
    width: 30px; height: 30px;
    background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 13px; font-weight: 800;
    letter-spacing: -0.5px;
}
.logo-text { font-size: 1.05rem; font-weight: 700; color: var(--gray-800); }
.logo-accent { color: var(--blue-600); }

.nav-links { display: flex; gap: 2px; }
.nav-link {
    font-size: 0.84rem; font-weight: 500; color: var(--text-secondary);
    padding: 5px 12px; border-radius: 6px; transition: all var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--blue-600); background: var(--blue-50); }

.header-status { display: flex; align-items: center; gap: 5px; font-size: 0.75rem; color: var(--text-secondary); }
.status-dot {
    width: 6px; height: 6px; background: #10b981; border-radius: 50%;
    animation: blink 2.5s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ========== Hero — 左右分栏 ========== */
.hero {
    background: linear-gradient(180deg, var(--blue-50) 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border);
    padding: 56px 0 48px;
}
.hero-row {
    max-width: 960px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; gap: 48px;
}
.hero-left { flex: 1; min-width: 0; }
.hero-right { flex-shrink: 0; width: 260px; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 4px 14px; border-radius: 50px;
    background: #fff; border: 1px solid var(--blue-200);
    font-size: 0.75rem; font-weight: 500; color: var(--blue-600);
    margin-bottom: 16px;
}
.badge-dot { width: 5px; height: 5px; background: var(--blue-500); border-radius: 50%; }

.hero-title {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 800; line-height: 1.25;
    margin-bottom: 12px; letter-spacing: -0.5px;
    color: var(--gray-900);
}
.gradient-text {
    background: linear-gradient(135deg, var(--blue-500) 0%, var(--blue-700) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
    font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7;
    margin-bottom: 0; max-width: 420px;
}

/* 统计面板 */
.stats-panel {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 24px;
    box-shadow: var(--shadow-sm);
}
.stats-panel-title {
    font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 1.5px; color: var(--blue-500); margin-bottom: 16px;
}
.stat-row { display: flex; flex-direction: column; gap: 14px; }
.stat-item-h {
    display: flex; align-items: center; justify-content: space-between;
    padding-bottom: 12px; border-bottom: 1px solid var(--gray-100);
}
.stat-item-h:last-child { border-bottom: none; padding-bottom: 0; }
.stat-label { font-size: 0.84rem; color: var(--text-secondary); font-weight: 500; }
.stat-number {
    font-size: 1.35rem; font-weight: 700; color: var(--blue-600);
    font-variant-numeric: tabular-nums;
}

/* ========== 广告组 ========== */
.promo-group {
    display: flex; flex-direction: column; gap: 8px;
    padding-top: 20px; padding-bottom: 8px;
}
.promo-link {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 18px;
    background: var(--bg-alt); border: 1px solid var(--border);
    border-radius: var(--radius); color: var(--text-primary);
    transition: all var(--transition);
}
.promo-link:hover {
    border-color: var(--blue-300); box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}
.promo-icon { font-size: 1.15rem; flex-shrink: 0; }
.promo-body { flex: 1; font-size: 0.84rem; line-height: 1.4; }
.promo-body strong { color: var(--blue-600); }
.promo-arrow { font-size: 0.8rem; color: var(--blue-500); font-weight: 600; white-space: nowrap; }

/* ========== 区域标题 ========== */
.section-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px; flex-wrap: wrap; gap: 12px;
}
.section-title { font-size: 1.15rem; font-weight: 700; color: var(--gray-800); }
.section-subtitle { font-size: 0.82rem; color: var(--text-secondary); }

/* ========== 筛选 ========== */
.filter-bar {
    display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px;
}
.filter-btn {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 5px 14px; border: 1px solid var(--border);
    border-radius: 50px; background: var(--surface);
    color: var(--text-secondary); font-size: 0.8rem;
    font-family: var(--font-sans); font-weight: 500;
    cursor: pointer; transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--blue-300); color: var(--blue-600); }
.filter-btn.active { border-color: var(--blue-500); color: #fff; background: var(--blue-500); }
.filter-icon { font-size: 0.88rem; }

/* ========== 账号列表（横条样式） ========== */
.accounts-section { padding: 36px 0 20px; }
.accounts-list { display: flex; flex-direction: column; gap: 10px; min-height: 120px; }

.account-row {
    display: grid;
    grid-template-columns: 44px 1fr 1fr 80px;
    gap: 12px; align-items: center;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px 18px;
    transition: all var(--transition);
    animation: fadeUp 0.35s ease backwards;
}
.account-row:hover {
    border-color: var(--blue-300); box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.account-row.offline { opacity: 0.5; }
.account-row.offline .row-status { background: var(--rose-50); color: var(--rose-500); }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.row-flag { font-size: 1.6rem; text-align: center; line-height: 1; }

.row-field { min-width: 0; }
.row-field-label {
    font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 1px; color: var(--text-secondary); margin-bottom: 3px;
}
.row-field-value {
    display: flex; align-items: center; gap: 6px;
    padding: 5px 10px; background: var(--gray-50);
    border: 1px solid var(--gray-200); border-radius: 6px;
    cursor: pointer; transition: all var(--transition);
    font-family: var(--font-mono); font-size: 0.82rem;
    color: var(--gray-700); word-break: break-all;
}
.row-field-value:hover { border-color: var(--blue-400); background: var(--blue-50); }
.row-field-value:active { transform: scale(0.98); }

.copy-icon {
    flex-shrink: 0; color: var(--gray-400);
    transition: color var(--transition);
}
.row-field-value:hover .copy-icon { color: var(--blue-500); }

.row-meta {
    display: flex; flex-direction: column; align-items: flex-end; gap: 4px;
}
.row-status {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 50px;
    font-size: 0.68rem; font-weight: 600;
    background: #ecfdf5; color: #059669;
}
.row-status-dot { width: 5px; height: 5px; background: currentColor; border-radius: 50%; }
.row-region { font-size: 0.7rem; color: var(--text-secondary); font-weight: 500; }
.row-time { font-size: 0.65rem; color: var(--gray-400); }

/* ========== 加载 ========== */
.loading-state {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; padding: 48px 0; gap: 14px;
}
.loader {
    width: 32px; height: 32px;
    border: 3px solid var(--blue-100); border-top-color: var(--blue-500);
    border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 0.86rem; color: var(--text-secondary); }
.loading-dots::after { content: ''; animation: dots 1.5s steps(4, end) infinite; }
@keyframes dots { 0%{content:''} 25%{content:'.'} 50%{content:'..'} 75%{content:'...'} }

/* ========== 更新信息 ========== */
.update-info {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; margin-top: 20px; font-size: 0.78rem; color: var(--text-secondary);
}
.refresh-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border: 1px solid var(--border);
    border-radius: 6px; background: var(--surface);
    color: var(--text-secondary); cursor: pointer;
    transition: all var(--transition); margin-left: 4px;
}
.refresh-btn:hover { border-color: var(--blue-400); color: var(--blue-600); }
.refresh-btn.spinning svg { animation: spin 0.7s linear infinite; }

/* ========== 使用教程 — 横向时间轴 ========== */
.guide-section {
    padding: 48px 0;
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.steps-timeline {
    display: flex; gap: 0; position: relative;
    overflow-x: auto; padding-bottom: 8px;
}
.step-item {
    flex: 1; min-width: 180px; text-align: center;
    position: relative; padding: 0 12px;
}
/* 连接线 */
.step-item:not(:last-child)::after {
    content: ''; position: absolute;
    top: 22px; right: -2px; width: calc(100% - 44px);
    height: 2px; background: var(--blue-200);
    left: calc(50% + 22px);
}
.step-circle {
    width: 44px; height: 44px; margin: 0 auto 12px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    background: var(--surface); border: 2px solid var(--blue-300);
    position: relative; z-index: 1;
    box-shadow: var(--shadow-xs);
}
.step-num {
    font-size: 0.6rem; font-weight: 700; color: var(--blue-500);
    letter-spacing: 0.5px; margin-bottom: 4px;
}
.step-item h3 { font-size: 0.88rem; font-weight: 600; color: var(--gray-700); margin-bottom: 4px; }
.step-item p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }

/* ========== FAQ — 紧凑 ========== */
.faq-section { padding: 48px 0 56px; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.faq-item {
    background: var(--bg-alt); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
    transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--blue-300); }
.faq-question {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; cursor: pointer;
    font-size: 0.86rem; font-weight: 500; color: var(--gray-700);
    transition: color var(--transition); user-select: none;
}
.faq-question:hover { color: var(--blue-600); }
.faq-arrow { font-size: 1rem; color: var(--gray-400); transition: transform var(--transition); }
.faq-item.open .faq-arrow { transform: rotate(90deg); color: var(--blue-500); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.open .faq-answer { max-height: 200px; }
.faq-answer p { padding: 0 16px 12px; font-size: 0.82rem; color: var(--text-secondary); line-height: 1.65; }

/* ========== 页脚 ========== */
.footer {
    padding: 28px 24px; text-align: center;
    border-top: 1px solid var(--border); background: var(--gray-50);
}
.footer-inner { max-width: 960px; margin: 0 auto; }
.footer .logo-text { font-size: 0.95rem; margin-bottom: 6px; display: inline-block; }
.footer-text { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 3px; }
.footer-copyright { font-size: 0.7rem; color: var(--gray-400); }

/* ========== Toast ========== */
.toast {
    position: fixed; bottom: 20px; left: 50%;
    transform: translateX(-50%) translateY(70px);
    display: flex; align-items: center; gap: 7px;
    padding: 9px 18px; background: var(--gray-800); color: #fff;
    border-radius: 8px; font-size: 0.83rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    z-index: 1000; opacity: 0;
    transition: all 0.25s ease; pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* ========== 弹窗 ========== */
.modal-overlay {
    position: fixed; inset: 0; z-index: 200;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
    padding: 20px;
}
.modal-box {
    background: var(--surface); border-radius: var(--radius-lg);
    max-width: 420px; width: 100%; padding: 28px 24px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.12);
    animation: modalPop 0.25s ease;
}
@keyframes modalPop {
    from { opacity: 0; transform: scale(0.96) translateY(8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-icon { text-align: center; font-size: 1.8rem; margin-bottom: 10px; }
.modal-title { text-align: center; font-size: 1.1rem; font-weight: 700; margin-bottom: 14px; color: var(--gray-800); }
.modal-body { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.65; }
.modal-body ul { list-style: none; margin: 10px 0; display: flex; flex-direction: column; gap: 6px; }
.modal-body li { font-size: 0.84rem; padding-left: 2px; }
.modal-warning { color: var(--rose-500); font-weight: 500; margin-top: 10px; text-align: center; font-size: 0.8rem; }
.modal-btn {
    display: block; width: 100%; padding: 11px; margin-top: 18px;
    border: none; border-radius: 8px;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: #fff; font-size: 0.88rem; font-weight: 600;
    font-family: var(--font-sans); cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}
.modal-btn:hover { box-shadow: 0 4px 14px rgba(37,99,235,0.3); transform: translateY(-1px); }
.modal-actions { display: flex; gap: 8px; margin-top: 18px; }
.modal-btn-cancel { flex: 1; background: var(--gray-100); color: var(--text-secondary); box-shadow: none; }
.modal-btn-cancel:hover { background: var(--gray-200); box-shadow: none; transform: none; }
.modal-btn-confirm { flex: 1; }
.modal-danger .modal-title { color: var(--blue-600); }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-row { flex-direction: column; gap: 28px; text-align: center; }
    .hero-left { order: 1; }
    .hero-right { order: 2; width: 100%; max-width: 300px; }
    .hero-desc { max-width: 100%; }
    .hero { padding: 40px 0 36px; }

    .account-row {
        grid-template-columns: 36px 1fr;
        gap: 8px;
    }
    .account-row .row-field:nth-child(3) { grid-column: 2; }
    .row-meta { grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; }

    .steps-timeline { flex-direction: column; gap: 16px; }
    .step-item:not(:last-child)::after { display: none; }
    .step-item { display: flex; align-items: flex-start; gap: 14px; text-align: left; min-width: auto; padding: 0; }
    .step-circle { margin: 0; flex-shrink: 0; width: 38px; height: 38px; font-size: 1rem; }
    .step-content { flex: 1; }

    .faq-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.4rem; }
    .stat-number { font-size: 1.15rem; }
}
/* ========== 登录页 ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, var(--blue-50) 0%, var(--bg) 55%, #fff 100%);
    padding: 24px;
}
.login-wrap { width: 100%; max-width: 400px; }
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: var(--shadow-md);
}
.login-brand {
    text-align: center;
    font-weight: 700;
    color: var(--blue-600);
    margin-bottom: 8px;
    font-size: 0.95rem;
}
.login-title {
    text-align: center;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 8px;
}
.login-desc {
    text-align: center;
    font-size: 0.86rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.6;
}
.login-tg {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 0 18px;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--blue-200);
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 0.86rem;
    font-weight: 600;
    transition: all var(--transition);
}
.login-tg:hover {
    color: var(--blue-700);
    border-color: var(--blue-300);
    background: #e8f1ff;
    box-shadow: var(--shadow-sm);
}
.login-tg svg { flex-shrink: 0; }
.login-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.82rem;
    margin-bottom: 14px;
    text-align: center;
}
.login-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.login-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-mono);
    letter-spacing: 1px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--gray-50);
}
.login-input:focus {
    border-color: var(--blue-400);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    background: #fff;
}
.login-btn {
    display: block;
    width: 100%;
    margin-top: 16px;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: #fff;
    font-size: 0.92rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
    transition: all var(--transition);
}
.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.login-hint {
    margin-top: 16px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--gray-400);
}
.hero-expire {
    margin-top: 14px;
    font-size: 0.78rem;
    color: var(--blue-600);
    font-weight: 500;
}
.nav-logout { color: var(--gray-400) !important; }
.nav-logout:hover { color: var(--blue-600) !important; background: var(--blue-50) !important; }
.nav-tg { color: var(--blue-600) !important; font-weight: 600 !important; }
.nav-tg:hover { background: var(--blue-50) !important; }
.promo-tg {
    background: linear-gradient(90deg, #eff6ff 0%, #f8fbff 100%);
    border-color: var(--blue-200);
}
.promo-tg:hover { border-color: var(--blue-400); }
.header.scrolled { box-shadow: var(--shadow-sm); }