/* ===== DitingCam 網站樣式 =====
 * 設計語言：紙質背景 + 深墨字 + 暖金點綴；對齊「諦聽」品牌的莊重感
 */

:root {
    --color-paper: #FAF7F0;          /* 米色紙質背景 */
    --color-paper-dim: #F2EEE3;      /* 卡片背景 */
    --color-ink: #1A1F2E;            /* 主文字（深墨） */
    --color-ink-soft: #4A5063;       /* 次要文字 */
    --color-ink-mute: #767D90;       /* 最弱文字、註解 */
    --color-gold: #B08D4A;           /* 暖金點綴 */
    --color-gold-soft: #D4B581;      /* 淡金（hover） */
    --color-line: #DFD7C4;           /* 分隔線 */
    --color-link: #2B4870;           /* 連結藍 */
    --color-link-hover: #3D6394;
    --color-error: #B0473D;

    --font-serif: "Noto Serif TC", "Source Han Serif TC", "PingFang TC", serif;
    --font-sans: "Noto Sans TC", "Source Han Sans TC", "PingFang TC", -apple-system, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;

    --shadow-sm: 0 1px 2px rgba(26, 31, 46, 0.04);
    --shadow-md: 0 4px 18px rgba(26, 31, 46, 0.06);

    --content-max: 1100px;
    --prose-max: 720px;
}

* { box-sizing: border-box; }

html {
    font-size: 17px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.75;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }

a {
    color: var(--color-link);
    text-decoration-color: var(--color-line);
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
a:hover {
    color: var(--color-link-hover);
    text-decoration-color: currentColor;
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.35;
    margin: 0 0 0.6em;
    letter-spacing: 0.005em;
}

h1 { font-size: clamp(2.1rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.55rem, 2.6vw, 2.05rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1.1em; }

hr {
    border: 0;
    border-top: 1px solid var(--color-line);
    margin: 2.5rem 0;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--color-paper-dim);
    border-radius: var(--radius-sm);
}
code { padding: 1px 5px; }
pre { padding: 14px 16px; overflow-x: auto; }

/* ===== Layout ===== */

.container {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 24px;
}

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

.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: 0.35em 0; }
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    font-size: 0.95rem;
}
.prose th, .prose td {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-line);
    vertical-align: top;
}
.prose th {
    background: var(--color-paper-dim);
    font-family: var(--font-serif);
    font-weight: 600;
}

/* ===== Site header ===== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(250, 247, 240, 0.92);
    backdrop-filter: saturate(140%) blur(8px);
    -webkit-backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 64px;
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 24px;
}

.brand {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    color: var(--color-ink);
    text-decoration: none;
    font-family: var(--font-serif);
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
}
.brand__mark {
    display: inline-block;
    width: 22px;
    height: 22px;
    transform: translateY(3px);
}
.brand__suffix {
    color: var(--color-gold);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.nav {
    display: flex;
    gap: 22px;
    font-size: 0.95rem;
}
.nav a {
    color: var(--color-ink-soft);
    text-decoration: none;
    padding: 6px 2px;
    border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--color-ink); border-bottom-color: var(--color-gold); }

@media (max-width: 640px) {
    .nav { gap: 14px; font-size: 0.88rem; }
    .nav a:nth-child(n+5) { display: none; }
}

/* ===== Hero ===== */

.hero {
    padding: 72px 0 56px;
    border-bottom: 1px solid var(--color-line);
    background:
        radial-gradient(ellipse 60% 70% at 80% 0%, rgba(176, 141, 74, 0.10), transparent 70%),
        radial-gradient(ellipse 50% 60% at 0% 100%, rgba(43, 72, 112, 0.07), transparent 70%),
        var(--color-paper);
}

.hero__eyebrow {
    display: inline-block;
    font-size: 0.82rem;
    letter-spacing: 0.18em;
    color: var(--color-gold);
    text-transform: uppercase;
    margin-bottom: 18px;
    font-weight: 500;
}

.hero h1 {
    margin-bottom: 18px;
    max-width: 16ch;
}
.hero__lede {
    font-size: 1.18rem;
    color: var(--color-ink-soft);
    max-width: 36ch;
    margin-bottom: 28px;
}

.hero__cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.98rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
    cursor: pointer;
}
.btn svg { width: 20px; height: 20px; }

.btn--primary {
    background: var(--color-ink);
    color: var(--color-paper);
}
.btn--primary:hover { background: #2A3247; transform: translateY(-1px); color: var(--color-paper); }

.btn--ghost {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-line);
}
.btn--ghost:hover { border-color: var(--color-ink); color: var(--color-ink); }

.btn--disabled {
    background: var(--color-paper-dim);
    color: var(--color-ink-mute);
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Section base ===== */

section.section {
    padding: 72px 0;
    border-bottom: 1px solid var(--color-line);
}
section.section:last-of-type { border-bottom: 0; }

.section__head {
    margin-bottom: 40px;
    max-width: 640px;
}
.section__eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-gold);
    font-weight: 500;
    margin-bottom: 10px;
}
.section__sub {
    color: var(--color-ink-soft);
    font-size: 1.05rem;
    margin-top: -0.4em;
}

/* ===== Feature grid ===== */

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
}
.feature {
    background: var(--color-paper-dim);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: 26px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.feature:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.feature__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--color-paper);
    border: 1px solid var(--color-line);
    color: var(--color-gold);
    margin-bottom: 16px;
}
.feature__icon svg { width: 22px; height: 22px; }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--color-ink-soft); margin: 0; font-size: 0.96rem; }

/* ===== Privacy promise (壓軸式區塊) ===== */

.promise {
    background: var(--color-ink);
    color: var(--color-paper);
    padding: 80px 0;
    border-bottom: 0;
}
.promise h2 { color: var(--color-paper); }
.promise .section__eyebrow { color: var(--color-gold-soft); }
.promise p { color: rgba(250, 247, 240, 0.82); }
.promise__list {
    list-style: none;
    padding: 0;
    margin: 32px 0 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px 28px;
}
.promise__list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: rgba(250, 247, 240, 0.92);
    font-size: 0.98rem;
}
.promise__list svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 4px;
    color: var(--color-gold-soft);
}

/* ===== Footer ===== */

.site-footer {
    padding: 48px 0 56px;
    background: var(--color-paper-dim);
    color: var(--color-ink-soft);
    font-size: 0.92rem;
}
.site-footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 32px;
}
@media (max-width: 720px) {
    .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
.site-footer h4 {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--color-ink-mute);
    margin-bottom: 14px;
    font-weight: 600;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--color-ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--color-ink); }

.site-footer__bottom {
    border-top: 1px solid var(--color-line);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--color-ink-mute);
}

/* ===== 法律文件樣式 ===== */

.legal-page { padding: 56px 0 96px; }
.legal-page .meta {
    background: var(--color-paper-dim);
    border-left: 3px solid var(--color-gold);
    padding: 16px 20px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 0 0 36px;
    font-size: 0.95rem;
    color: var(--color-ink-soft);
}
.legal-page .meta strong { color: var(--color-ink); }
.legal-page .toc {
    background: var(--color-paper-dim);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    margin: 0 0 40px;
}
.legal-page .toc h4 {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--color-ink-mute);
    margin: 0 0 10px;
    font-family: var(--font-sans);
}
.legal-page .toc ol {
    margin: 0;
    padding-left: 1.2em;
    columns: 2;
    column-gap: 24px;
    font-size: 0.95rem;
}
@media (max-width: 600px) { .legal-page .toc ol { columns: 1; } }

.legal-page .summary {
    background: linear-gradient(135deg, rgba(176, 141, 74, 0.12), rgba(176, 141, 74, 0.04));
    border: 1px solid rgba(176, 141, 74, 0.3);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    margin: 0 0 40px;
    font-size: 1.05rem;
    color: var(--color-ink);
}
.legal-page .summary strong { color: var(--color-gold); }

.legal-page h2 {
    margin-top: 2.4em;
    padding-top: 0.4em;
    border-top: 1px solid var(--color-line);
}
.legal-page h2:first-of-type { border-top: 0; padding-top: 0; }

.legal-page .yes { color: #4A6F3F; font-weight: 600; }
.legal-page .no { color: var(--color-error); font-weight: 600; }
.legal-page .na { color: var(--color-ink-mute); font-style: italic; }

.legal-page .icon-no, .legal-page .icon-yes {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ===== Support / contact 卡片 ===== */

.contact-card {
    background: var(--color-paper-dim);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    margin: 24px 0;
}
.contact-card .label {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--color-ink-mute);
    margin-bottom: 6px;
}
.contact-card .email {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    color: var(--color-ink);
}

/* ===== Skip-to-content（無障礙） ===== */

.skip-link {
    position: absolute;
    top: -40px;
    left: 8px;
    background: var(--color-ink);
    color: var(--color-paper);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    z-index: 100;
}
.skip-link:focus { top: 8px; }

/* ===== Print（列印隱私政策友善） ===== */
@media print {
    .site-header, .site-footer, .hero__cta, .nav { display: none !important; }
    body { background: white; color: black; font-size: 12pt; }
    a { color: black; text-decoration: underline; }
    .legal-page { padding: 0; }
    .legal-page .summary, .legal-page .meta { background: none; border: 1px solid #999; }
}