/* 常见问题：结构化答案优先，保持无脚本可用。 */
.ztc-faq-page {
    --faq-blue: #0067b4;
    --faq-cyan: #61ccf0;
    --faq-ink: #202c3f;
    --faq-muted: #68778a;
    --faq-line: #dfe8f0;
    --faq-banner-blue: var(--ztc-banner-authority);
    color: var(--faq-ink);
    background: #fff;
}

.faq-hero {
    position: relative;
    min-height: 620px;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 174px 0 92px;
    color: #fff;
    background: var(--ztc-banner-luminous);
}

.faq-hero-grid {
    position: absolute;
    inset: 0;
    opacity: .22;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
    background-size: 74px 74px;
    mask-image: linear-gradient(90deg, #000, transparent 82%);
}

.faq-hero-layout {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 270px;
    gap: clamp(64px, 10vw, 150px);
    align-items: end;
}

.faq-eyebrow,
.faq-kicker {
    margin: 0 0 18px;
    color: var(--faq-cyan);
    font-size: var(--ztc-banner-label);
    font-weight: 800;
    letter-spacing: .17em;
}

.faq-hero h1 {
    margin: 0 0 25px;
    color: #fff;
    font: 700 var(--ztc-banner-h1-feature)/1.08 var(--ztc-serif, serif);
    letter-spacing: -.035em;
}

.faq-hero-lead {
    max-width: 44em;
    margin: 0;
    color: rgba(255, 255, 255, .82);
    font-size: var(--ztc-banner-lead);
    line-height: 1.9;
    text-wrap: pretty;
}

.faq-hero-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
}

.faq-hero-index {
    padding: 28px 0 8px;
    border-top: 1px solid rgba(255, 255, 255, .28);
}

.faq-hero-index span,
.faq-hero-index small {
    display: block;
    color: rgba(255, 255, 255, .62);
    font-size: 11px;
    letter-spacing: .12em;
}

.faq-hero-index strong {
    display: block;
    margin: 16px 0 8px;
    color: #fff;
    font: 700 76px/1 var(--ztc-serif, serif);
}

.faq-reading {
    padding: 118px 0 132px;
}

.faq-reading-layout {
    display: grid;
    grid-template-columns: minmax(260px, .62fr) minmax(0, 1.38fr);
    gap: clamp(64px, 9vw, 130px);
    align-items: start;
}

.faq-reading-intro {
    position: sticky;
    top: 148px;
}

.faq-kicker {
    color: var(--faq-blue);
}

.faq-reading-intro h2,
.faq-closing h2 {
    margin: 0;
    font: 700 clamp(34px, 4vw, 48px)/1.22 var(--ztc-serif, serif);
    letter-spacing: -.025em;
    text-wrap: balance;
}

.faq-reading-intro > p:not(.faq-kicker) {
    max-width: 24em;
    margin: 20px 0 30px;
    color: var(--faq-muted);
    font-size:16px;
    line-height: 1.85;
}

.faq-reading-intro nav {
    display: grid;
    border-top: 1px solid var(--faq-line);
}

.faq-reading-intro nav a {
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #40536a;
    border-bottom: 1px solid var(--faq-line);
    font-size: 13px;
    font-weight: 700;
}

.faq-reading-intro nav a:hover { color: var(--faq-blue); }

.faq-list {
    border-top: 1px solid #cad8e4;
    scroll-margin-top: 130px;
}

.faq-item {
    border-bottom: 1px solid #cad8e4;
}

.faq-item summary {
    min-height: 104px;
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr) 28px;
    gap: 22px;
    align-items: center;
    padding: 22px 0;
    cursor: pointer;
    list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary > span { color: var(--faq-blue); font: 700 14px/1 var(--ztc-serif, serif); }
.faq-item summary strong { color: #26364b; font: 700 20px/1.55 var(--ztc-serif, serif); text-wrap: pretty; }

.faq-item summary i {
    position: relative;
    width: 28px;
    height: 28px;
    border: 1px solid #cbd9e4;
    border-radius: 50%;
}

/* 2026-09-02 加减号伪元素 → morphicons 形变 svg（faq-item toggle 驱动） */
.faq-item summary i svg { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 12px; height: 12px; }
.faq-item summary:focus-visible { outline: 3px solid rgba(97, 204, 240, .65); outline-offset: 5px; }

.faq-answer {
    padding: 0 56px 35px 70px;
}

.faq-answer p {
    max-width: 48em;
    margin: 0;
    color: #526276;
    font-size: var(--ztc-fs-body);
    line-height: var(--ztc-lh-body);
    text-wrap: pretty;
}

.faq-closing {
    padding: 90px 0;
    color: #fff;
    background: var(--faq-banner-blue);
}

.faq-closing-layout {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 60px;
}

.faq-closing h2 { color: #fff; }
.faq-closing p:not(.faq-eyebrow) { max-width: 44em; margin: 18px 0 0; color: rgba(255, 255, 255, .72); line-height: 1.8; }
.faq-closing-actions { display: flex; flex-wrap: wrap; gap: 12px; }

@media (max-width: 860px) {
    .faq-hero-layout { grid-template-columns: 1fr 190px; }
    .faq-reading-layout { grid-template-columns: 1fr; gap: 52px; }
    .faq-reading-intro { position: static; }
    .faq-reading-intro nav { max-width: 480px; }
    .faq-closing-layout { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 640px) {
    .faq-hero { min-height: 0; padding: 126px 0 68px; }
    .faq-hero-layout { grid-template-columns: 1fr; gap: 48px; }
    .faq-hero h1 { font-size: var(--ztc-banner-h1-feature); }
    .faq-hero-lead { font-size: var(--ztc-banner-lead); }
    .faq-hero-index { display: grid; grid-template-columns: auto 1fr; gap: 2px 16px; align-items: end; }
    .faq-hero-index span { grid-column: 1 / -1; }
    .faq-hero-index strong { margin: 12px 0 0; font-size: 54px; }
    .faq-hero-index small { padding-bottom: 7px; }
    .faq-reading { padding: 78px 0 88px; }
    .faq-item summary { min-height: 90px; grid-template-columns: 36px minmax(0, 1fr) 28px; gap: 12px; }
    .faq-item summary strong { font-size:16px; }
    .faq-answer { padding: 0 8px 30px 48px; }
    .faq-answer p { font-size: var(--ztc-fs-body); }  /* 2026-09-02 排版规范：答案是连续阅读文字，手机端不下调 */
    .faq-closing { padding: 72px 0; }
    .faq-closing-actions { width: 100%; display: grid; }
    .faq-closing-actions a { width: 100%; min-height: 48px; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    .faq-item summary i::after { transition: none; }
    .ztc-faq-page * { scroll-behavior: auto !important; }
}