/* CBON Home Page - 首頁樣式
   設計原則：與 shop 頁共用同一個 design system
   - 背景：白底 / 淺色漸層（跟 esim-shop / game-shop 一致）
   - 圓角白卡 + 統一 token
   - hero 區用 mesh 漸層 + 漸層裝飾條，跟 shop hero 視覺一致
*/

:root {
    --bg: var(--cbon-bg);
    --surface: var(--cbon-bg-soft);
    --surface-strong: var(--cbon-surface-strong);
    --border: var(--cbon-border);
    --border-soft: var(--cbon-border-soft);
    --text: var(--cbon-text);
    --muted: var(--cbon-text-muted);
    --primary: var(--cbon-primary);
    --primary-deep: var(--cbon-primary-700);
    --accent: var(--cbon-accent);
    --gradient: var(--cbon-gradient);
    --gradient-soft: var(--cbon-gradient-soft);
    --shadow: var(--cbon-shadow-md);
    --shadow-strong: var(--cbon-shadow-lg);
    --radius: var(--cbon-radius-lg);
    --shell: min(640px, calc(100% - 32px));
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    background: linear-gradient(180deg, #ffffff 0%, var(--cbon-bg-soft) 50%, #ffffff 100%);
    color: var(--text);
    line-height: 1.5;
    letter-spacing: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

a {
    color: inherit;
    text-decoration: none;
}

img,
svg {
    display: block;
}

button,
input {
    font: inherit;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.shell {
    width: var(--shell);
    margin: 0 auto;
}

/* --- 1. Header（手機優先、淺色毛玻璃）--- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid var(--border-soft);
}

.header-stack {
    padding: 10px 0 10px;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 44px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
}

.brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(79, 70, 229, 0.15);
}

.brand-copy {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.01em;
}

.brand-subtitle {
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 500;
}

.utility-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.utility-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--surface);
    color: var(--text);
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    transition: all 0.15s ease;
}

.utility-link:hover {
    background: var(--cbon-primary-50);
    color: var(--primary);
}

.utility-link svg {
    width: 14px;
    height: 14px;
}

.lang-row {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 0 4px;
}

.lang-label {
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0 6px;
}

.lang-btn {
    padding: 4px 10px;
    background: transparent;
    color: var(--muted);
    border: none;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.lang-btn.active {
    background: var(--text);
    color: white;
}

/* --- 2. Hero（淺底 + mesh 漸層裝飾）--- */
.hero {
    padding: 32px 0 24px;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    align-items: center;
    padding: 28px 22px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.hero-layout::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
}

.hero-layout::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-soft);
    opacity: 0.4;
    pointer-events: none;
}

.hero-copy {
    position: relative;
    z-index: 1;
}

.eyebrow {
    display: inline-block;
    padding: 4px 10px;
    background: var(--cbon-primary-50);
    color: var(--primary-deep);
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    margin: 0 0 8px;
    letter-spacing: 0.02em;
}

.hero-text {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.hero-side {
    position: relative;
    z-index: 1;
}

.hero-side-label {
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 8px;
}

.hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
}

.hero-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 8px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 600;
    transition: all 0.15s ease;
}

.hero-action:hover {
    background: var(--cbon-primary-50);
    border-color: var(--primary);
    color: var(--primary-deep);
    transform: translateY(-1px);
}

.hero-action svg {
    width: 22px;
    height: 22px;
    color: var(--primary);
}

.hero-action--primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.hero-action--primary svg {
    color: white;
}

.hero-action--primary:hover {
    background: var(--primary-deep);
    color: white;
    border-color: var(--primary-deep);
}

@media (min-width: 640px) {
    .hero-layout {
        grid-template-columns: 1.4fr 1fr;
    }
}

/* --- 3. Sections --- */
.section {
    padding: 24px 0;
}

.section.section-muted {
    background: var(--cbon-bg-soft);
    border-radius: var(--cbon-radius-lg);
}

.section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 14px;
    padding: 0 4px;
}

.section-head h2 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
    letter-spacing: -0.01em;
}

.section-head .section-sub {
    font-size: 0.78rem;
    color: var(--muted);
}

/* --- 4. 服務卡片網格（兩層）--- */
.primary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.secondary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 12px;
}

@media (min-width: 640px) {
    .primary-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .secondary-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    display: flex;
    flex-direction: column;
    padding: 16px 14px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
    min-height: 100px;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.service-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.15);
}

.service-card:hover::before {
    opacity: 1;
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.card-icon {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--cbon-primary-50);
    color: var(--primary);
    border-radius: 10px;
}

.card-icon svg {
    width: 20px;
    height: 20px;
}

.card-body h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 2px;
    line-height: 1.3;
}

.card-body p {
    font-size: 0.78rem;
    color: var(--muted);
    margin: 0;
    line-height: 1.4;
}

/* tone 變體（卡片強調色，用在 icon 背景與邊條） */
.tone-blue .card-icon { background: #dbeafe; color: #1d4ed8; }
.tone-blue::before { background: #1d4ed8; }

.tone-green .card-icon { background: #d1fae5; color: #047857; }
.tone-green::before { background: #047857; }

.tone-violet .card-icon { background: #ede9fe; color: #6d28d9; }
.tone-violet::before { background: #6d28d9; }

.tone-amber .card-icon { background: #fef3c7; color: #b45309; }
.tone-amber::before { background: #b45309; }

.tone-rose .card-icon { background: #ffe4e6; color: #be123c; }
.tone-rose::before { background: #be123c; }

.tone-teal .card-icon { background: #ccfbf1; color: #0f766e; }
.tone-teal::before { background: #0f766e; }

.tone-cyan .card-icon { background: #cffafe; color: #155e75; }
.tone-cyan::before { background: #155e75; }

.tone-indigo .card-icon { background: #e0e7ff; color: #3730a3; }
.tone-indigo::before { background: #3730a3; }

.tone-slate .card-icon { background: #f1f5f9; color: #475569; }
.tone-slate::before { background: #475569; }

/* --- 5. 關於我們 --- */
.about {
    padding: 32px 0 16px;
}

.about-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 22px 20px;
    box-shadow: var(--shadow);
}

.about-card h2 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.about-card p {
    color: var(--text);
    font-size: 0.92rem;
    line-height: 1.7;
    margin: 0 0 10px;
}

.about-card .about-lead {
    color: var(--muted);
    font-size: 0.85rem;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 14px 0;
}

@media (min-width: 640px) {
    .about-values {
        grid-template-columns: repeat(3, 1fr);
    }
}

.value-item {
    padding: 12px;
    background: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border-soft);
}

.value-item h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 4px;
}

.value-item p {
    font-size: 0.78rem;
    color: var(--muted);
    margin: 0;
    line-height: 1.4;
}

/* --- 6. Footer --- */
.site-footer {
    padding: 24px 0 80px;
    border-top: 1px solid var(--border-soft);
    background: var(--surface);
    margin-top: 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-item {
    padding: 12px 14px;
    background: white;
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-item strong {
    font-size: 0.78rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-item span {
    font-size: 0.88rem;
    color: var(--text);
    line-height: 1.5;
}

/* --- 7. AI 客服懸浮按鈕 --- */
#aiChatWidget {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 1100;
}

.ai-chat-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.ai-chat-btn:hover {
    transform: scale(1.05);
}

.ai-chat-btn svg {
    width: 26px;
    height: 26px;
}

.ai-chat-window {
    position: fixed;
    right: 16px;
    bottom: 80px;
    width: min(360px, calc(100vw - 32px));
    height: 480px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(15, 17, 38, 0.2);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
}

.ai-chat-window:not(.hidden) {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.ai-chat-header {
    background: var(--gradient);
    color: white;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ai-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: white;
    padding: 2px;
}

.ai-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.ai-chat-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0;
}

.ai-chat-header .ai-status {
    font-size: 0.7rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 4px;
}

.ai-chat-header .ai-status::before {
    content: "";
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
    display: inline-block;
}

.ai-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    background: var(--surface);
}

.ai-msg,
.user-msg {
    margin-bottom: 10px;
    padding: 10px 12px;
    border-radius: 14px;
    font-size: 0.88rem;
    line-height: 1.5;
    max-width: 85%;
}

.ai-msg {
    background: white;
    border: 1px solid var(--border-soft);
    border-bottom-left-radius: 4px;
}

.user-msg {
    background: var(--primary);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 4px;
}

.ai-chat-input {
    border-top: 1px solid var(--border-soft);
    padding: 10px;
    display: flex;
    gap: 8px;
    background: white;
}

.ai-chat-input input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.15s ease;
}

.ai-chat-input input:focus {
    border-color: var(--primary);
}

.ai-chat-input button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-chat-input button svg {
    width: 16px;
    height: 16px;
}

.hidden {
    display: none !important;
}

/* --- 8. Support-list（底部支援連結：icon + 文字）--- */
.support-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.support-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #ffffff;
    border: 1px solid var(--cbon-border-soft);
    border-radius: var(--cbon-radius-md);
    color: var(--cbon-text);
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.support-link:hover {
    transform: translateY(-1px);
    border-color: var(--cbon-primary-100);
    box-shadow: var(--cbon-shadow-md);
}

.support-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--cbon-primary-50);
    color: var(--cbon-primary);
    border-radius: var(--cbon-radius-sm);
    flex-shrink: 0;
}

.support-icon svg {
    width: 18px;
    height: 18px;
}

.support-copy {
    flex: 1;
    min-width: 0;
}

.support-copy strong {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--cbon-text);
}

/* --- 9. 語言切換條（與 shop 頁一致）--- */
.lang-switcher-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border-soft);
}

/* --- 8. 響應式微調 --- */
@media (min-width: 640px) {
    .brand-subtitle {
        font-size: 0.78rem;
    }
    .hero-text {
        font-size: 1.6rem;
    }
    .section {
        padding: 32px 0;
    }
}