/* ============================================================
   商务洽谈 — Swiss Ledger 单据纸本
   时效铭牌 · 四栏联系磁贴 · 三条路径 · 账簿折叠 · 纸面表单
   ============================================================ */

/* ---------- 01 页首 ---------- */
.ct-line { margin-bottom: 18px; }
.ct-quick { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.ct-quick a { transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast); }
.ct-quick a:hover { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.ct-quick a i { color: var(--signal); }
.ct-quick a:hover i { color: var(--on-ink); }

.sla {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 22px 24px 24px;
    border: 1px solid var(--ink);
    background: var(--card);
}
.sla-num {
    font-size: clamp(52px, 7vw, 92px);
    font-weight: 500;
    line-height: 0.85;
    letter-spacing: -0.06em;
    color: var(--ink);
}
.sla-note { font-size: 14px; color: var(--ink-2); }
.sla-bar { display: block; height: 4px; margin-top: 8px; background: linear-gradient(90deg, var(--signal) 0 34%, var(--line-2) 34% 100%); }

/* ---------- 02 联系磁贴 ---------- */
.reach-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line-2);
}
.reach-tile {
    display: flex;
    flex-direction: column;
    padding: 26px 22px 26px;
    border-left: 1px solid var(--line-2);
    transition: background var(--t-fast);
}
.reach-tile:first-child { border-left: none; padding-left: 0; }
.reach-tile:hover { background: var(--paper); }
.reach-tile-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--ink);
}
.reach-code { font-size: 12px; font-weight: 500; letter-spacing: 0.16em; color: var(--ink); }
.reach-value {
    display: block;
    margin-top: 18px;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.45;
    color: var(--ink);
    overflow-wrap: anywhere;
    transition: color var(--t-fast);
}
a.reach-value:hover { color: var(--signal); }
.reach-value--mail { font-family: var(--font-mono); font-size: 15px; font-weight: 500; letter-spacing: -0.01em; }
.reach-value--addr { font-size: 15.5px; line-height: 1.7; }
.reach-desc { margin-top: 12px; font-size: 14px; line-height: 1.8; color: var(--ink-2); }

/* ---------- 03 三条路径 ---------- */
.ways-list { border-top: 1px solid var(--ink); }
.way {
    display: grid;
    grid-template-columns: minmax(0, 92px) minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 20px 34px;
    align-items: start;
    padding: 28px 0;
    border-bottom: 1px solid var(--line-2);
    transition: padding-left var(--t-fast);
}
.way:hover { padding-left: 10px; }
.way-node {
    font-family: var(--font-mono);
    font-size: clamp(38px, 4.6vw, 62px);
    font-weight: 500;
    line-height: 0.85;
    letter-spacing: -0.05em;
    color: var(--ink);
    transition: color var(--t-fast);
}
.way:hover .way-node { color: var(--signal); }
.way-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ink);
}
.way-text { margin-top: 10px; font-size: 15px; line-height: 1.85; color: var(--ink-2); max-width: 58ch; }
.way .pt-item { margin-bottom: 8px; }
.way-points { padding-top: 6px; border-left: 1px solid var(--line-2); padding-left: 24px; }

/* ---------- 04 常见问题 ---------- */
.faq-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(30px, 4vw, 60px);
    align-items: start;
}
.faq-side { position: sticky; top: calc(var(--rail-h) + var(--nav-h) + 34px); }
.faq-side .sec-index { margin-bottom: 14px; font-size: clamp(38px, 5vw, 64px); }
.faq-side-title {
    padding-top: 12px;
    border-top: 1px solid var(--ink);
    font-family: var(--font-display);
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--ink);
}
.faq-side-note { margin-top: 12px; font-size: 14.5px; line-height: 1.85; color: var(--ink-2); max-width: 42ch; }

.faq-list { border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--line-2); }
.faq-item summary {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) 22px;
    align-items: baseline;
    gap: 16px;
    padding: 20px 0;
    cursor: pointer;
    list-style: none;
    transition: padding-left var(--t-fast);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { padding-left: 8px; }
.faq-idx { font-size: 12px; letter-spacing: 0.14em; color: var(--ink-3); }
.faq-item:hover .faq-idx, .faq-item[open] .faq-idx { color: var(--signal); }
.faq-q {
    font-family: var(--font-display);
    font-size: 17.5px;
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.5;
    color: var(--ink);
}
.faq-mark { position: relative; width: 14px; height: 14px; justify-self: end; align-self: center; }
.faq-mark::before, .faq-mark::after {
    content: "";
    position: absolute;
    background: var(--ink);
    transition: transform var(--t-med), background var(--t-med);
}
.faq-mark::before { left: 0; right: 0; top: 6px; height: 1.5px; }
.faq-mark::after { top: 0; bottom: 0; left: 6px; width: 1.5px; }
.faq-item[open] .faq-mark::after { transform: scaleY(0); }
.faq-item[open] .faq-mark::before { background: var(--signal); }
.faq-answer {
    padding: 0 0 22px 56px;
    font-size: 15px;
    line-height: 1.9;
    color: var(--ink-2);
    max-width: 78ch;
}

/* ---------- 05 纸面表单 ---------- */
.form-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.68fr) minmax(0, 1.32fr);
    gap: 0 clamp(30px, 4vw, 60px);
    border-top: 1px solid var(--ink);
    padding-top: clamp(28px, 3vw, 44px);
}
.form-side { display: flex; flex-direction: column; }
.form-side-title {
    font-family: var(--font-display);
    font-size: clamp(22px, 2.6vw, 32px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.25;
    color: var(--ink);
}
.form-side-title + .form-side-title { margin-top: 2px; }
.form-tips { display: grid; gap: 14px; margin-top: 26px; }
.form-tips li { display: flex; gap: 12px; font-size: 14.5px; line-height: 1.8; color: var(--ink-2); }
.form-tip-idx { color: var(--signal); font-size: 11px; letter-spacing: 0.12em; padding-top: 5px; }
.form-side-note { margin-top: auto; padding-top: 22px; color: var(--ink-3); }

.form-body { display: flex; flex-direction: column; gap: 26px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 26px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field--full { grid-column: 1 / -1; }
.form-field label {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    padding: 11px 0;
    border: none;
    border-bottom: 1px solid var(--ink);
    border-radius: 0;
    background: transparent;
    font-family: var(--font-body);
    font-size: 15.5px;
    color: var(--ink);
    transition: border-color var(--t-fast), background var(--t-fast);
}
.form-field textarea { min-height: 120px; resize: vertical; line-height: 1.8; }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--ink-3); opacity: 0.7; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus { outline: none; border-color: var(--signal); }
.form-field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: right 6px center, right 0 center; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; padding-right: 22px; }
.form-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.form-note { font-size: 13px; color: var(--ink-3); max-width: 46ch; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
    .reach-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .reach-tile { border-top: 1px solid var(--line-2); }
    .reach-tile:nth-child(1), .reach-tile:nth-child(2) { border-top: none; }
    .reach-tile:nth-child(odd) { border-left: none; padding-left: 0; }
    .way { grid-template-columns: 66px minmax(0, 1fr); }
    .way-points { grid-column: 2; border-left: none; padding-left: 0; }
    .faq-grid { grid-template-columns: 1fr; gap: 26px; }
    .faq-side { position: static; }
    .form-panel { grid-template-columns: 1fr; gap: 32px; }
    .form-side-note { margin-top: 22px; }
}

@media (max-width: 768px) {
    .reach-grid { grid-template-columns: 1fr; }
    .reach-tile, .reach-tile:nth-child(odd) { border-left: none; padding-left: 0; border-top: 1px solid var(--line-2); }
    .reach-tile:first-child { border-top: none; }
    .way { grid-template-columns: 48px minmax(0, 1fr); gap: 14px; }
    .way-points { grid-column: 1 / -1; }
    .form-grid { grid-template-columns: 1fr; }
    .faq-item summary { grid-template-columns: 28px minmax(0, 1fr) 18px; gap: 12px; }
    .faq-answer { padding-left: 40px; }
}