:root {
    --support-carbon: #070c12;
    --support-carbon-2: #0c1522;
    --support-paper: #f3f7fc;
    --support-white: #fff;
    --support-ink: #111824;
    --support-body: #485464;
    --support-muted: #6c7787;
    --support-line: #dfe4ea;
    --support-cobalt: #1768ff;
    --support-cobalt-dark: #0c4bd8;
    --support-danger: #b9381f;
    --support-success: #16815d;
    --support-shadow: 0 24px 72px rgba(7, 12, 18, .2);
    --support-ease: cubic-bezier(.22, 1, .36, 1);
}

.zks-support,
.zks-support * { box-sizing: border-box; }
.zks-support { position: fixed; right: 24px; bottom: 24px; z-index: 50; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--support-ink); }
.zks-support button,
.zks-support input,
.zks-support textarea { font: inherit; }
.zks-support [hidden] { display: none !important; }
.zks-support svg { fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

.zks-support__launcher { display: flex; align-items: center; min-width: 132px; min-height: 52px; gap: 9px; padding: 0 17px; border: 1px solid #0e58df; border-radius: 14px; color: var(--support-white); background: var(--support-cobalt); box-shadow: 0 14px 34px rgba(23, 104, 255, .32); cursor: pointer; transition: transform .2s var(--support-ease), background-color .2s ease, box-shadow .2s ease; }
.zks-support__launcher:hover { background: var(--support-cobalt-dark); box-shadow: 0 18px 38px rgba(23, 104, 255, .38); transform: translateY(-2px); }
.zks-support__launcher:active { transform: translateY(0); }
.zks-support__launcher:focus-visible,
.zks-support__panel button:focus-visible,
.zks-support__panel input:focus-visible,
.zks-support__panel textarea:focus-visible,
.zks-support__panel a:focus-visible { outline: 3px solid rgba(23, 104, 255, .32); outline-offset: 3px; }
.zks-support__launcher svg { width: 22px; height: 22px; }
.zks-support__launcher span { font-size: 15px; font-weight: 800; }
.zks-support__launcher i { display: grid; place-items: center; min-width: 20px; height: 20px; margin-left: auto; padding: 0 5px; border-radius: 11px; color: var(--support-white); background: #c63820; font-size: 11px; font-style: normal; font-weight: 900; }

.zks-support__panel { position: absolute; right: 0; bottom: 68px; display: grid; grid-template-rows: auto auto minmax(132px, 1fr) auto auto auto; width: min(390px, calc(100vw - 32px)); max-height: min(720px, calc(100vh - 116px)); overflow: hidden; border: 1px solid #cfd7e4; border-radius: 18px; background: var(--support-white); box-shadow: var(--support-shadow); animation: zks-support-in .24s var(--support-ease); }
.zks-support__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; padding: 14px 16px 14px 20px; color: var(--support-white); background: var(--support-cobalt); }
.zks-support__head > div { display: grid; gap: 5px; }
.zks-support__head strong { font-size: 20px; line-height: 1.2; }
.zks-support__head span { display: flex; align-items: center; gap: 7px; color: #edf4ff; font-size: 12px; }
.zks-support__head span i { width: 8px; height: 8px; border-radius: 50%; background: #52d6a8; box-shadow: 0 0 0 4px rgba(82, 214, 168, .18); }
.zks-support__head button { display: grid; place-items: center; width: 44px; height: 44px; border: 0; border-radius: 10px; color: var(--support-white); background: rgba(255, 255, 255, .1); cursor: pointer; }
.zks-support__head button:hover { background: rgba(255, 255, 255, .18); }
.zks-support__head button svg { width: 24px; height: 24px; }

.zks-support__identity { display: flex; align-items: center; gap: 10px; padding: 13px 18px; border-bottom: 1px solid var(--support-line); background: var(--support-paper); }
.zks-support__identity > span { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; color: var(--support-white); background: var(--support-carbon-2); font-size: 14px; font-weight: 900; }
.zks-support__identity div { display: grid; gap: 2px; }
.zks-support__identity b { font-size: 14px; }
.zks-support__identity small { color: var(--support-muted); font-size: 11px; }

.zks-support__messages { min-height: 132px; max-height: 230px; overflow-y: auto; padding: 16px; background: #f8faff; scrollbar-width: thin; }
.zks-support__message { display: flex; flex-direction: column; align-items: flex-start; margin-bottom: 12px; }
.zks-support__message--visitor { align-items: flex-end; }
.zks-support__message span { margin: 0 2px 5px; color: var(--support-muted); font-size: 10px; }
.zks-support__message p { max-width: 86%; margin: 0; padding: 10px 12px; border: 1px solid var(--support-line); border-radius: 12px 12px 12px 3px; color: var(--support-ink); background: var(--support-white); font-size: 13px; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.zks-support__message--visitor p { color: var(--support-white); background: var(--support-cobalt); border-color: var(--support-cobalt); border-radius: 12px 12px 3px 12px; }
.zks-support__message--system p { color: #39485a; background: #edf4ff; border-color: #cbdcff; }

.zks-support__quick { display: flex; gap: 7px; padding: 0 16px 12px; overflow-x: auto; background: #f8faff; scrollbar-width: none; }
.zks-support__quick::-webkit-scrollbar { display: none; }
.zks-support__quick button { flex: none; min-height: 38px; padding: 0 12px; border: 1px solid #b9ccf7; border-radius: 10px; color: var(--support-cobalt-dark); background: var(--support-white); font-size: 12px; font-weight: 750; cursor: pointer; }
.zks-support__quick button:hover { border-color: var(--support-cobalt); background: #edf4ff; }

.zks-support__form { display: grid; gap: 8px; padding: 14px 16px 10px; border-top: 1px solid var(--support-line); }
.zks-support__form > label,
.zks-support__contact label { color: var(--support-ink); font-size: 12px; font-weight: 800; }
.zks-support__form textarea,
.zks-support__form input { width: 100%; border: 1px solid #bdc8d8; border-radius: 10px; color: var(--support-ink); background: var(--support-white); font-size: 14px; }
.zks-support__form textarea { min-height: 82px; padding: 10px 11px; line-height: 1.55; resize: vertical; }
.zks-support__form input { min-height: 42px; padding: 0 11px; }
.zks-support__form textarea::placeholder,
.zks-support__form input::placeholder { color: #66758a; opacity: 1; }
.zks-support__contact { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 7px 9px; }
.zks-support__error { margin: 0; padding: 8px 10px; border: 1px solid #edb5a9; border-radius: 8px; color: #7b2415; background: #fff0ec; font-size: 12px; line-height: 1.5; }
.zks-support__send { justify-self: end; min-width: 112px; min-height: 38px; padding: 0 18px; border: 1px solid var(--support-cobalt); border-radius: 8px; color: var(--support-white); background: var(--support-cobalt); font-size: 13px; font-weight: 850; cursor: pointer; transition: background-color .18s ease, transform .18s var(--support-ease); }
.zks-support__send:hover { background: var(--support-cobalt-dark); }
.zks-support__send:active { transform: translateY(1px); }
.zks-support__send:disabled { border-color: #9eabc0; color: #fff; background: #9eabc0; cursor: wait; }
.zks-support__privacy { margin: 0; color: var(--support-muted); font-size: 10px; line-height: 1.45; text-align: center; }

.zks-support__foot { padding: 0 16px 14px; }
.zks-support__foot a { display: flex; align-items: center; justify-content: center; min-height: 44px; gap: 7px; border: 1px solid #b9ccf7; border-radius: 10px; color: var(--support-cobalt-dark); font-size: 13px; font-weight: 800; text-decoration: none; }
.zks-support__foot a:hover { border-color: var(--support-cobalt); background: #edf4ff; }
.zks-support__foot svg { width: 18px; height: 18px; }

@keyframes zks-support-in { from { opacity: 0; transform: translateY(10px) scale(.985); } to { opacity: 1; transform: none; } }

@media (max-width: 640px) {
    .zks-support { right: max(12px, env(safe-area-inset-right)); bottom: max(12px, env(safe-area-inset-bottom)); left: max(12px, env(safe-area-inset-left)); }
    .zks-support__launcher { min-width: 0; margin-left: auto; padding: 0 15px; }
    .zks-support__panel { position: fixed; right: max(10px, env(safe-area-inset-right)); bottom: calc(76px + env(safe-area-inset-bottom)); left: max(10px, env(safe-area-inset-left)); width: auto; max-height: calc(100dvh - 94px - env(safe-area-inset-bottom)); border-radius: 16px; }
    .zks-support__messages { max-height: 26dvh; }
    .zks-support__contact { grid-template-columns: 1fr; }
    .zks-support__contact label { margin-top: 2px; }
}

@media (prefers-reduced-motion: reduce) {
    .zks-support__panel { animation: none; }
    .zks-support__launcher,
    .zks-support__send { transition: none; }
}