:root {
    --color-bg: #0d1117;
    --color-bg-card: rgba(22, 27, 34, 0.85);
    --color-border: #30363d;
    --color-border-hover: #8b949e;
    --color-text-primary: #c9d1d9;
    --color-text-secondary: #8b949e;
    --color-text-muted: #484f58;
    --color-accent: #1f6feb;
    --color-accent-light: #388bfd;
    --color-success: #2ea043;
    --color-warning: #d29922;
    --color-danger: #f85149;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--color-bg);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

.bg-decoration {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.25;
}

.bg-orb-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #1f6feb 0%, transparent 70%);
    top: -100px; left: -100px;
}

.bg-orb-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #8957e5 0%, transparent 70%);
    bottom: -100px; right: -100px;
}

/* 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px; height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, #1f6feb, #8957e5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(31, 111, 235, 0.15);
    color: var(--color-accent-light);
    border: 1px solid rgba(31, 111, 235, 0.3);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.nav-link:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: #fff;
    background: rgba(31, 111, 235, 0.2);
}

/* 主区 */
.main-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 24px 60px;
}

.hero {
    text-align: center;
    margin-bottom: 40px;
}

.hero-title {
    font-size: 2.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #8957e5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.hero-subtitle {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* 上传卡片 */
.upload-section {
    margin-bottom: 32px;
}

.upload-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 28px;
    backdrop-filter: blur(12px);
}

.form-row {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    margin-bottom: 20px;
}

.form-item {
    flex: 1;
}

.form-item.full {
    flex: 1 1 100%;
}

.form-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.form-item select {
    width: 100%;
    padding: 10px 12px;
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.form-item select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-arrow {
    padding-bottom: 10px;
    color: var(--color-text-muted);
    font-size: 1.2rem;
}

.mode-options {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.mode-option {
    flex: 1;
    min-width: 200px;
    padding: 12px 14px;
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: all 0.2s;
}

.mode-option:has(input:checked) {
    border-color: var(--color-accent);
    background: rgba(31, 111, 235, 0.1);
    color: var(--color-text-primary);
}

.mode-option input {
    accent-color: var(--color-accent);
}

.engine-tag {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    margin-left: 6px;
    vertical-align: middle;
}

.tag-free {
    background: rgba(46, 160, 67, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(46, 160, 67, 0.3);
}

.tag-vip {
    background: linear-gradient(135deg, rgba(255, 185, 0, 0.2), rgba(255, 140, 0, 0.2));
    color: #ffb900;
    border: 1px solid rgba(255, 185, 0, 0.4);
}

.tag-fast {
    background: linear-gradient(135deg, rgba(0, 200, 255, 0.15), rgba(0, 140, 255, 0.15));
    color: #00c8ff;
    border: 1px solid rgba(0, 200, 255, 0.4);
}

.engine-desc {
    display: block;
    font-size: 0.72rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* 上传区 */
.upload-area {
    margin-top: 8px;
    padding: 36px 20px;
    border: 2px dashed var(--color-border);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(13, 17, 23, 0.4);
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--color-accent);
    background: rgba(31, 111, 235, 0.05);
}

.upload-area.has-file {
    border-color: var(--color-success);
    background: rgba(46, 160, 67, 0.05);
}

.upload-icon {
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.upload-text {
    font-size: 1rem;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.upload-tip {
    margin-top: 16px;
    padding: 10px 14px;
    border: 1px solid;
    border-radius: 8px;
    font-size: 0.85rem;
}

/* 按钮 */
.btn-primary {
    width: 100%;
    margin-top: 18px;
    padding: 13px;
    background: linear-gradient(135deg, #1f6feb, #388bfd);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(31, 111, 235, 0.35);
}

.btn-primary:disabled {
    background: #21262d;
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.btn-secondary {
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
}

/* 任务列表 */
.task-section {
    margin-top: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px 20px;
}

.task-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.task-check {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.task-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.task-name {
    font-size: 0.95rem;
    color: var(--color-text-primary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.task-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-left: 8px;
}

.task-badge {
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 500;
}

.badge-processing {
    background: rgba(31, 111, 235, 0.15);
    color: var(--color-accent-light);
    border: 1px solid rgba(31, 111, 235, 0.3);
}

.badge-done {
    background: rgba(46, 160, 67, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(46, 160, 67, 0.3);
}

.badge-error {
    background: rgba(248, 81, 73, 0.15);
    color: var(--color-danger);
    border: 1px solid rgba(248, 81, 73, 0.3);
}

.task-progress {
    height: 6px;
    background: rgba(13, 17, 23, 0.6);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.task-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #1f6feb, #388bfd);
    border-radius: 3px;
    transition: width 0.3s;
}

.task-message {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.task-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
}

.btn-download {
    padding: 6px 14px;
    background: var(--color-success);
    border: none;
    border-radius: 6px;
    color: #fff;
    font-size: 0.8rem;
    text-decoration: none;
    cursor: pointer;
}

.btn-download:hover {
    background: #3fb950;
}

/* 用户区 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-auth {
    padding: 6px 16px;
    background: linear-gradient(135deg, #1f6feb, #388bfd);
    border: none;
    border-radius: 6px;
    color: #fff;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-auth:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(31, 111, 235, 0.35);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.user-email {
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-vip-badge {
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    background: linear-gradient(135deg, rgba(255, 185, 0, 0.2), rgba(255, 140, 0, 0.2));
    color: #ffb900;
    border: 1px solid rgba(255, 185, 0, 0.4);
}

.btn-logout {
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-muted);
    font-size: 0.72rem;
    cursor: pointer;
}

.btn-logout:hover {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 28px;
    width: 380px;
    max-width: 90vw;
}

.modal-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-tab {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-tab.active {
    color: var(--color-accent-light);
    border-bottom-color: var(--color-accent);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-form input {
    padding: 10px 12px;
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-primary);
    font-size: 0.9rem;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.code-row {
    display: flex;
    gap: 8px;
}

.code-row input {
    flex: 1;
}

.btn-send-code {
    padding: 8px 14px;
    background: rgba(31, 111, 235, 0.15);
    border: 1px solid rgba(31, 111, 235, 0.3);
    border-radius: 8px;
    color: var(--color-accent-light);
    font-size: 0.8rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.btn-send-code:hover:not(:disabled) {
    background: rgba(31, 111, 235, 0.25);
}

.btn-send-code:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.auth-error {
    color: var(--color-danger);
    font-size: 0.8rem;
    min-height: 20px;
}

.auth-success {
    color: var(--color-success);
    font-size: 0.8rem;
    min-height: 20px;
}

/* VIP 弹窗 */
.vip-card {
    text-align: center;
    width: 440px;
}

.vip-title {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffb900, #ff8c00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.vip-desc {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.vip-plans {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.vip-plan {
    position: relative;
    padding: 14px 6px;
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.vip-plan:hover {
    border-color: var(--color-border-hover);
}

.vip-plan.selected {
    border-color: #ffb900;
    background: rgba(255, 185, 0, 0.08);
}

.plan-tag {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    padding: 1px 8px;
    background: linear-gradient(135deg, #ffb900, #ff8c00);
    color: #000;
    font-size: 0.6rem;
    font-weight: 700;
    border-radius: 8px;
    white-space: nowrap;
}

.plan-duration {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.plan-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.price-symbol {
    font-size: 0.75rem;
    font-weight: 400;
}

.plan-unit {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.plan-discount {
    color: #f85149;
    font-weight: 600;
}

.vip-features {
    text-align: left;
    margin-bottom: 16px;
}

.vip-feature {
    padding: 8px 12px;
    margin-bottom: 6px;
    background: rgba(255, 185, 0, 0.05);
    border: 1px solid rgba(255, 185, 0, 0.15);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--color-text-primary);
}

.vip-feature::before {
    content: "* ";
    color: #ffb900;
}

.pay-section {
    margin-bottom: 4px;
}

.pay-buttons {
    display: flex;
    gap: 10px;
}

.btn-pay {
    flex: 1;
    padding: 11px 12px;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s;
}

.btn-pay:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-pay-alipay {
    background: #1677ff;
    color: #fff;
}

.btn-pay-alipay:hover:not(:disabled) {
    background: #4096ff;
}

.btn-pay-wechat {
    background: #07c160;
    color: #fff;
}

.btn-pay-wechat:hover:not(:disabled) {
    background: #2aae67;
}

.pay-error {
    color: var(--color-danger);
    font-size: 0.8rem;
    margin-top: 8px;
    text-align: center;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px 20px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

.footer a {
    color: var(--color-text-secondary);
    text-decoration: none;
}

@media (max-width: 720px) {
    .form-row { flex-direction: column; align-items: stretch; }
    .form-arrow { display: none; }
    .hero-title { font-size: 1.8rem; }
    .upload-card { padding: 20px; }
}