/* ==========================================================
 * 用户端样式 - 现代 SaaS 风格
 * 文件: assets/css/user.css
 *
 * 依赖：tokens.css（必须先加载）
 * ========================================================== */

/* ====== 基础（组件级 token → 语义 token 映射） ====== */
:root {
    --primary:        var(--color-primary);
    --primary-dark:   var(--color-primary-hover);
    --primary-light:  var(--color-primary-soft);
    --secondary:      var(--color-violet-500);
    --grad:           var(--gradient-brand);
    --grad-soft:      var(--gradient-brand-soft);
    --grad-bg:        var(--gradient-bg-soft);
    --text:   var(--color-text-primary);
    --text-2: var(--color-text-secondary);
    --text-3: var(--color-text-tertiary);
    --muted:  var(--color-text-muted);
    --border: var(--color-border);
    --bg-card: rgba(255, 255, 255, 0.85);
    --shadow-sm: var(--shadow-sm);
    --shadow:    var(--shadow-md);
    --shadow-lg: var(--shadow-xl);
    --radius:    var(--radius-card);      /* 12px */
    --radius-lg: var(--radius-2xl);       /* 16px */
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { -webkit-text-size-adjust: 100%; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    color: var(--text); font-size: 15px; line-height: 1.6;
    background: var(--grad-bg);
    min-height: 100vh; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
em { font-style: normal; color: var(--muted); font-size: 12px; }
button { font-family: inherit; cursor: pointer; border: 0; outline: none; }
input, select, textarea { font-family: inherit; outline: none; }

/* ====== 通用按钮 ====== */
.btn-fill, .btn-ghost {
    display: inline-flex; align-items: center; justify-content: center;
    padding: var(--space-2-5) var(--space-6);
    border-radius: var(--radius-button);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: var(--leading-tight);
    transition: transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out),
                background var(--duration-normal) var(--ease-out),
                color var(--duration-normal) var(--ease-out);
    cursor: pointer; border: 0; white-space: nowrap;
}
.btn-fill {
    background: var(--grad); color: var(--color-primary-foreground);
    box-shadow: var(--shadow-brand-sm);
}
.btn-fill:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-brand);
}
.btn-fill:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.7); color: var(--color-primary);
    border: 1px solid var(--color-primary-soft);
}
.btn-ghost:hover {
    background: var(--color-primary-soft);
    transform: translateY(-2px);
}
.btn-lg {
    padding: var(--space-3-5) var(--space-8);
    font-size: var(--font-size-base);
    border-radius: var(--radius-xl);
}

/* ====== 顶部导航 ====== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,0.85); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226,232,240,.6);
    transition: all .3s;
}
.nav-inner {
    max-width: 1200px; margin: 0 auto; padding: 14px 24px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px;
}
.nav-brand {
    display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px;
    color: var(--text);
}
.brand-icon { font-size: 22px; }
.nav-links {
    display: flex; align-items: center; gap: 28px;
    flex: 1; justify-content: center;
}
.nav-links a {
    font-size: 14px; color: var(--text-2); position: relative;
    transition: color .2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
    background: var(--grad); border-radius: 2px; transform: scaleX(0);
    transition: transform .3s;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-actions { display: flex; gap: 10px; }
.nav-toggle {
    display: none; width: 38px; height: 38px; background: transparent; padding: 0;
    flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span {
    display: block; width: 22px; height: 2px; background: var(--text-2); border-radius: 2px;
    transition: all .25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ====== Hero ====== */
.hero {
    position: relative; padding: 130px 24px 80px; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.orb {
    position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55;
    animation: floatOrb 18s ease-in-out infinite;
}
.orb-1 { width: 420px; height: 420px; background: #a5b4ff; top: -80px; left: -80px; }
.orb-2 { width: 380px; height: 380px; background: #f0a6ff; top: 80px; right: -80px; animation-delay: -6s; }
.orb-3 { width: 260px; height: 260px; background: #93c5fd; bottom: 0; left: 40%; animation-delay: -12s; }
@keyframes floatOrb {
    0%, 100% { transform: translate(0,0) scale(1); }
    33%      { transform: translate(40px,-30px) scale(1.08); }
    66%      { transform: translate(-30px,30px) scale(0.95); }
}
.grid-bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(91,108,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91,108,255,.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, #000 30%, transparent 80%);
}
.hero-inner {
    max-width: 1200px; margin: 0 auto; position: relative; z-index: 1;
    display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center;
}
.hero-tag {
    display: inline-block; padding: 6px 14px; border-radius: 20px; font-size: 13px;
    background: rgba(91,108,255,.12); color: var(--primary); font-weight: 500;
    margin-bottom: 22px;
    animation: slideDown .6s ease both;
}
.hero-title {
    font-size: 48px; line-height: 1.2; font-weight: 800; margin-bottom: 20px;
    color: var(--text); letter-spacing: -0.02em;
    animation: slideUp .6s .1s ease both;
}
.hero-title .grad {
    background: var(--grad);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
    color: var(--text-2); font-size: 16px; margin-bottom: 32px; line-height: 1.8;
    animation: slideUp .6s .2s ease both;
}
.hero-btns {
    display: flex; gap: 14px; margin-bottom: 48px; flex-wrap: wrap;
    animation: slideUp .6s .3s ease both;
}
.hero-stats {
    display: flex; gap: 40px;
    animation: slideUp .6s .4s ease both;
}
.hero-stats .stat .num {
    font-size: 30px; font-weight: 700; color: var(--text);
    background: var(--grad); -webkit-background-clip: text;
    background-clip: text; color: transparent; line-height: 1;
}
.hero-stats .stat .lbl {
    color: var(--text-3); font-size: 13px; margin-top: 4px;
}

.hero-visual {
    position: relative; height: 420px;
    animation: fadeIn 1s .3s ease both;
}
.float-card {
    position: absolute; background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: var(--radius); padding: 18px 22px;
    box-shadow: var(--shadow-lg); min-width: 200px;
    animation: floatCard 6s ease-in-out infinite;
}
.float-card .fc-row { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.float-card .fc-num { font-size: 26px; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.float-card .fc-lbl { color: var(--text-3); font-size: 12px; margin-top: 2px; }
.float-card .fc-bar { width: 100%; height: 6px; background: var(--primary-light); border-radius: 3px; overflow: hidden; margin: 6px 0; }
.float-card .fc-bar i { display: block; height: 100%; background: var(--grad); border-radius: 3px; animation: barFill 2s ease both; }
@keyframes barFill { from { width: 0; } }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
.dot.green  { background: #38a169; box-shadow: 0 0 8px #38a169; }
.dot.blue   { background: var(--primary); box-shadow: 0 0 8px var(--primary); }
.dot.orange { background: #ed8936; box-shadow: 0 0 8px #ed8936; }
.f1 { top: 20px; left: 30px; animation-delay: 0s; }
.f2 { top: 150px; right: 0; animation-delay: -2s; }
.f3 { bottom: 30px; left: 60px; animation-delay: -4s; }
@keyframes floatCard {
    0%,100% { transform: translateY(0); }
    50%     { transform: translateY(-14px); }
}

/* ====== Features ====== */
.features {
    padding: 80px 24px; position: relative;
}
.features-inner { max-width: 1200px; margin: 0 auto; }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-tag {
    display: inline-block; padding: 5px 14px; border-radius: 20px;
    background: var(--primary-light); color: var(--primary);
    font-size: 12px; font-weight: 500; margin-bottom: 14px;
}
.sec-head h2 {
    font-size: 36px; font-weight: 700; margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.sec-head p { color: var(--text-3); font-size: 15px; }

.feat-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
}
.feat {
    background: var(--bg-card); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.6);
    border-radius: var(--radius-lg); padding: 32px 26px;
    box-shadow: var(--shadow-sm);
    transition: all .35s cubic-bezier(.4,0,.2,1);
    position: relative; overflow: hidden;
}
.feat::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--grad); transform: scaleX(0); transform-origin: left;
    transition: transform .4s;
}
.feat:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.feat:hover::before { transform: scaleX(1); }
.feat-ico {
    width: 52px; height: 52px; border-radius: 14px;
    background: var(--primary-light); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; margin-bottom: 16px;
    transition: all .3s;
}
.feat:hover .feat-ico { transform: rotate(-8deg) scale(1.05); background: var(--grad); color: #fff; }
.feat h3 { font-size: 17px; margin-bottom: 8px; }
.feat p { color: var(--text-3); font-size: 14px; line-height: 1.6; }

/* ====== Auth 卡片 ====== */
.auth {
    padding: 80px 24px 120px; position: relative;
}
.auth-inner { max-width: 480px; margin: 0 auto; }
.auth-card {
    background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: var(--radius-lg); padding: 40px 36px 32px;
    box-shadow: var(--shadow-lg); position: relative;
}
.auth-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: var(--grad);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}
.auth-head { text-align: center; margin-bottom: 28px; }
.auth-logo {
    width: 64px; height: 64px; margin: 0 auto 14px;
    background: var(--grad); border-radius: 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 30px; color: #fff;
    box-shadow: 0 10px 30px rgba(91,108,255,.4);
}
.auth-title { font-size: 22px; margin-bottom: 4px; font-weight: 700; }
.auth-sub { color: var(--text-3); font-size: 13px; }

.tabs {
    position: relative; display: flex; gap: 0; margin-bottom: 24px;
    background: #f3f5fb; border-radius: 12px; padding: 4px;
}
.tabs .tab {
    flex: 1; padding: 10px 0; text-align: center; cursor: pointer;
    color: var(--text-3); font-size: 14px; font-weight: 500;
    transition: color .25s;
    position: relative; z-index: 1; user-select: none;
}
.tabs .tab.active { color: var(--primary); }
.tab-indicator {
    position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc((100% - 8px)/3);
    background: #fff; border-radius: 9px;
    box-shadow: 0 2px 8px rgba(91,108,255,.18);
    transition: transform .35s cubic-bezier(.4,0,.2,1);
    z-index: 0;
}

.form { display: none; animation: fadeSlide .35s ease both; }
.form.active { display: block; }
.form .row { margin-bottom: 16px; }
.form label {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 6px; color: var(--text-2); font-size: 13px; font-weight: 500;
}
.input-wrap {
    position: relative; display: flex; align-items: center;
    background: #f7f9fd; border: 1.5px solid transparent;
    border-radius: 11px; transition: all .2s;
}
.input-wrap:focus-within {
    background: #fff; border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(91,108,255,.12);
}
.input-wrap .ico {
    padding: 0 12px; font-size: 16px; opacity: .65;
}
.input-wrap input {
    flex: 1; padding: 11px 12px 11px 0; border: 0; background: transparent;
    font-size: 14px; color: var(--text); width: 100%; min-width: 0;
}
.input-wrap input::placeholder { color: var(--muted); }
.input-group .btn-code {
    padding: 0 14px; height: 32px; margin-right: 4px;
    background: var(--primary-light); color: var(--primary);
    border-radius: 8px; font-size: 13px; font-weight: 500; white-space: nowrap;
    transition: all .2s; border: 0;
}
.input-group .btn-code:hover:not([disabled]) {
    background: var(--primary); color: #fff;
}
.input-group .btn-code[disabled] { opacity: .55; cursor: not-allowed; }
.btn-primary {
    width: 100%; padding: 14px; border: 0; border-radius: 12px;
    background: var(--grad); color: #fff;
    font-size: 15px; font-weight: 600; margin-top: 8px;
    box-shadow: 0 6px 18px rgba(91,108,255,.35);
    transition: all .25s; position: relative; overflow: hidden;
}
.btn-primary::before {
    content: ''; position: absolute; top: 50%; left: 50%;
    width: 0; height: 0; border-radius: 50%;
    background: rgba(255,255,255,.25);
    transform: translate(-50%,-50%); transition: width .5s,height .5s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(91,108,255,.45); }
.btn-primary:hover::before { width: 320px; height: 320px; }
.btn-primary:active { transform: translateY(0); }
.btn-primary[disabled] { opacity: .65; cursor: not-allowed; transform: none; }
.btn-primary span { position: relative; z-index: 1; }
.tip { display: block; color: var(--text-3); font-size: 12px; margin-top: 4px; }
.msg { font-size: 13px; min-height: 18px; margin-top: 14px; transition: all .2s; }
.msg.err { color: #e53e3e; }
.msg.ok  { color: #38a169; }

/* ====== 用户面板 ====== */
.user-section {
    padding: 130px 24px 80px;
}
.user-inner { max-width: 720px; margin: 0 auto; }
.user-card {
    background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: var(--radius-lg); padding: 36px 36px 32px;
    box-shadow: var(--shadow-lg);
}
.user-card .greeting {
    display: flex; align-items: center; gap: 16px; padding-bottom: 24px;
    border-bottom: 1px dashed var(--border); margin-bottom: 24px;
}
.user-card .avatar {
    width: 60px; height: 60px; border-radius: 50%; background: var(--grad);
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 24px; font-weight: 700; flex-shrink: 0;
    box-shadow: 0 6px 18px rgba(91,108,255,.35);
}
.user-card h2 { font-size: 22px; margin-bottom: 4px; }
.user-card .greet-sub { color: var(--text-3); font-size: 13px; }

.info-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px; margin-bottom: 24px;
}
.info-grid .info-box {
    background: linear-gradient(135deg, #f6f8ff, #fff);
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 16px;
    transition: all .25s;
}
.info-grid .info-box:hover {
    transform: translateY(-3px); border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}
.info-box .lbl { color: var(--text-3); font-size: 12px; margin-bottom: 6px; display: flex; align-items: center; gap: 4px; }
.info-box .val { font-size: 18px; font-weight: 600; word-break: break-all; }
.info-box .val.expired { color: #e53e3e; }
.info-box .val.muted   { color: var(--muted); font-weight: 500; }

.user-meta {
    background: #f7f9fd; border-radius: var(--radius); padding: 14px 16px;
    font-size: 13px; line-height: 1.8; word-break: break-all; color: var(--text-2);
    margin-bottom: 22px;
}
.user-meta .k { color: var(--text-3); display: inline-block; min-width: 56px; }
.user-meta code {
    background: #fff; padding: 2px 6px; border-radius: 4px; font-size: 12px;
    border: 1px solid var(--border); color: var(--primary);
}

.user-card .actions { display: flex; gap: 10px; flex-wrap: wrap; }
.user-card .actions .btn {
    flex: 1 1 auto; min-width: 120px;
    padding: 12px 14px; border-radius: 11px; font-size: 14px; font-weight: 500;
    text-align: center; transition: all .25s; border: 1px solid var(--border);
    background: #fff; color: var(--text-2);
}
.user-card .actions .btn:hover {
    border-color: var(--primary); color: var(--primary);
    transform: translateY(-2px); box-shadow: var(--shadow-sm);
}
.user-card .actions .btn.primary {
    background: var(--grad); border-color: transparent; color: #fff;
    box-shadow: 0 6px 16px rgba(91,108,255,.3);
}
.user-card .actions .btn.primary:hover {
    color: #fff; transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(91,108,255,.4);
}
.user-card .actions .btn.red {
    background: #fff5f5; border-color: #fed7d7; color: #c53030;
}
.user-card .actions .btn.red:hover {
    background: #e53e3e; color: #fff; border-color: #e53e3e;
}

/* ====== 模态框 ====== */
.modal-mask {
    position: fixed; inset: 0; z-index: var(--z-modal);
    background: rgba(17, 24, 39, 0.5);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    padding: var(--space-5);
    padding-top: max(var(--space-5), var(--safe-top));
    padding-bottom: max(var(--space-5), var(--safe-bottom));
    animation: fadeIn var(--duration-normal) var(--ease-out);
    overflow: hidden;
}
.modal-box {
    background: var(--color-card);
    border-radius: var(--radius-modal);
    width: 100%; max-width: 460px;
    /* flex 列布局，head/foot 不滚，body 单独滚 */
    display: flex; flex-direction: column;
    max-height: 100%;
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    animation: modalPopIn var(--duration-slow) var(--ease-spring);
}
@keyframes modalPopIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-head {
    flex: 0 0 auto;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    display: flex; justify-content: space-between; align-items: center;
    font-weight: var(--font-weight-semibold); font-size: var(--font-size-base);
}
.modal-close {
    cursor: pointer; color: var(--color-muted-foreground);
    font-size: var(--font-size-lg);
    width: 28px; height: 28px; border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    transition: background var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out);
}
.modal-close:hover { background: var(--color-gray-100); color: var(--color-text-primary); }
.modal-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: var(--space-6);
}
.modal-body .row { margin-bottom: var(--space-4); }
.modal-body label {
    display: block; margin-bottom: var(--space-1-5);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}
.modal-tip {
    color: var(--color-text-secondary); font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
    padding: var(--space-2-5) var(--space-3);
    background: var(--color-primary-soft);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-primary);
}
.modal-tip strong { color: var(--color-primary); }
.select-input {
    flex: 1; padding: 11px 12px 11px 0; border: 0; background: transparent;
    font-size: var(--font-size-sm); color: var(--color-foreground); width: 100%; cursor: pointer;
    -webkit-appearance: none; appearance: none;
}
.modal-foot {
    flex: 0 0 auto;
    padding: var(--space-3-5) var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex; gap: var(--space-2-5); justify-content: flex-end;
    background: var(--color-card);
}

/* ====== Footer ====== */
.footer {
    background: #1a202c; color: #cbd5e1; padding: 36px 24px;
    text-align: center;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer p { font-size: 13px; line-height: 1.8; }
.footer .muted { color: #718096; font-size: 12px; }

/* ====== Toast ====== */
.toast {
    position: fixed; left: 50%; top: var(--space-6);
    transform: translate(-50%, -30px);
    background: rgba(17, 24, 39, 0.95); color: #fff;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    z-index: var(--z-toast);
    opacity: 0; pointer-events: none;
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
    box-shadow: var(--shadow-2xl);
}
.toast.show { opacity: 1; transform: translate(-50%,0); }
.toast.ok   { background: linear-gradient(135deg,#38a169,#2f855a); }
.toast.err  { background: linear-gradient(135deg,#e53e3e,#c53030); }

/* ====== 动画 ====== */
@keyframes slideUp   { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-15px);} to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn    { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeSlide { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { animation: slideUp .5s cubic-bezier(.4,0,.2,1) both; }

/* ====== 响应式 ====== */
@media (max-width: 900px) {
    .hero { padding: 110px 20px 60px; }
    .hero-inner { grid-template-columns: 1fr; gap: 48px; }
    .hero-title { font-size: 36px; }
    .hero-visual { height: 320px; }
    .float-card { padding: 14px 16px; min-width: 170px; }
    .float-card .fc-num { font-size: 22px; }
    .nav-links { display: none; }
    .nav-actions { display: none; }
    .nav-toggle { display: flex; }
    /* 移动端展开导航：合并为单面板，可滚动避免叠层 */
    body.nav-mobile-open .nav-links {
        display: flex; position: fixed; left: 0; right: 0; top: 60px;
        bottom: 0;                                  /* 占满剩余视口，便于滚动 */
        flex-direction: column;
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 16px 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        animation: slideDown .25s ease;
        z-index: 99;
        overflow-y: auto;                            /* 内容超长可滚动 */
        -webkit-overflow-scrolling: touch;
    }
    body.nav-mobile-open .nav-links a {
        padding: 14px 8px;
        border-bottom: 1px solid rgba(91,108,255,.06);
        font-size: 15px;
    }
    body.nav-mobile-open .nav-actions {
        display: flex; position: fixed; left: 0; right: 0;
        bottom: 0;                                   /* 贴底，不再用写死的 top 偏移 */
        flex-direction: column;
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 14px 20px calc(14px + env(safe-area-inset-bottom));
        gap: 10px;
        border-top: 1px solid var(--border);
        box-shadow: 0 -8px 24px rgba(91,108,255,.10);
        animation: slideDown .25s ease;
        z-index: 100;                                /* 高于链接面板 */
    }
    /* 链接面板底部预留按钮区高度，避免最后一项被遮挡 */
    body.nav-mobile-open .nav-links { padding-bottom: 140px; }
    body.nav-mobile-open .nav-actions .btn-fill,
    body.nav-mobile-open .nav-actions .btn-ghost { width: 100%; padding: 12px; }
    .sec-head h2 { font-size: 28px; }
    .feat { padding: 24px 20px; }
}

@media (max-width: 600px) {
    body { font-size: 14px; }
    .nav-inner { padding: 12px 16px; }
    .brand-name { font-size: 15px; }
    .hero { padding: 100px 16px 50px; }
    .hero-title { font-size: 28px; line-height: 1.25; }
    .hero-sub { font-size: 14px; margin-bottom: 24px; }
    .hero-btns { gap: 10px; }
    .btn-fill, .btn-ghost { padding: 9px 18px; font-size: 13px; }
    .btn-lg { padding: 12px 22px; font-size: 14px; }
    .hero-stats { gap: 22px; }
    .hero-stats .stat .num { font-size: 24px; }
    .hero-visual { height: 260px; }
    .float-card { padding: 12px 14px; min-width: 150px; }
    .float-card .fc-num { font-size: 18px; }
    .f1 { top: 10px; left: 10px; }
    .f2 { top: 110px; right: 6px; }
    .f3 { bottom: 10px; left: 30px; }
    .features { padding: 60px 16px; }
    .sec-head { margin-bottom: 36px; }
    .sec-head h2 { font-size: 24px; }
    .feat-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .feat { padding: 20px 16px; }
    .feat-ico { width: 44px; height: 44px; font-size: 22px; border-radius: 12px; }
    .feat h3 { font-size: 15px; }
    .feat p { font-size: 13px; }
    .auth { padding: 60px 16px 80px; }
    .auth-card { padding: 28px 22px 24px; }
    .auth-logo { width: 54px; height: 54px; font-size: 26px; }
    .auth-title { font-size: 19px; }
    .tabs .tab { font-size: 13px; padding: 9px 0; }
    .input-wrap input { font-size: 14px; padding: 10px 10px 10px 0; }
    .input-wrap .ico { padding: 0 10px; font-size: 14px; }
    .btn-primary { padding: 12px; font-size: 14px; }
    .input-group .btn-code { padding: 0 10px; font-size: 12px; }
    .user-section { padding: 100px 16px 60px; }
    .user-card { padding: 24px 20px; }
    .user-card .avatar { width: 50px; height: 50px; font-size: 20px; }
    .user-card h2 { font-size: 18px; }
    .info-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .info-grid .info-box { padding: 12px 14px; }
    .info-box .val { font-size: 16px; }
    .modal-box { max-width: 100%; }
    .modal-head { padding: 14px 18px; font-size: 15px; }
    .modal-body { padding: 18px; }
    .modal-foot { padding: 12px 18px; }
    .toast { left: 16px; right: 16px; transform: translateY(-30px); top: 16px; padding: 11px 16px; font-size: 13px; }
    .toast.show { transform: translateY(0); }
}

@media (max-width: 380px) {
    .hero-title { font-size: 24px; }
    .hero-stats { gap: 16px; }
    .hero-stats .stat .num { font-size: 20px; }
    .feat-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
}