:root {
    --bg: #f7f9fc;
    --paper: #fff;
    --ink: #0f172a;
    --muted: #5b6472;
    --line: #e5e7eb;
    --accent: #0ea5e9;
    --r: 18px;
    --shadow: 0 10px 26px rgba(2, 6, 23, .10);
}

.page-head h1 {
    margin: 0;
    font-size: clamp(30px, 3.8vw, 44px);
    color: var(--ink)
}

.page-head .sub {
    margin: 8px auto 16px;
    color: var(--muted);
    max-width: 740px
}

.search svg {
    width: 18px;
    height: 18px;
    color: #64748b
}

.search input {
    border: none;
    outline: none;
    font-size: 14px;
    min-width: 260px
}




/* Accordion */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
    perspective: 800px
}

.item {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--r);
    box-shadow: var(--shadow);
    overflow: hidden;
    transform: translateY(10px) scale(.98);
    opacity: 0;
    animation: faqIn .6s cubic-bezier(.2, .7, .2, 1) forwards;
}

.item:nth-child(1) {
    animation-delay: .03s
}

.item:nth-child(2) {
    animation-delay: .06s
}

.item:nth-child(3) {
    animation-delay: .09s
}

.item:nth-child(4) {
    animation-delay: .12s
}

.item:nth-child(5) {
    animation-delay: .15s
}

.item:nth-child(6) {
    animation-delay: .18s
}

@keyframes faqIn {
    to {
        transform: none;
        opacity: 1
    }
}

.question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    transition: background-color .2s ease;
}

.question:hover {
    background: #f4f8ff
}

.ico {
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: #eef6ff;
    border: 1px solid #dbeafe;
    color: #1e40af;
    transition: transform .25s ease
}

.item.active .ico {
    transform: rotate(180deg)
}

/* Smooth height animation */
.answer {
    height: 0;
    overflow: hidden;
    transition: height .28s ease;
    background: radial-gradient(900px 400px at 10% 0%, rgba(14, 165, 233, .06), transparent 60%),
    linear-gradient(180deg, #ffffff, #fbfdff);
    border-top: 1px solid var(--line);
}

.answer-inner {
    padding: 12px 20px 18px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.62
}

.answer-inner ul {
    margin: 6px 0 0 18px;
    list-style: disc
}

.answer-inner p {
    margin: 6px 0
}

.faq {
    margin-top: 20px;
    margin-bottom: 120px;
}

mark {
    background: #fff3bf;
    padding: 0 2px;
    border-radius: 4px
}